feat(unionflow): ajout Spec-Kit, constitution, mission mutuelles

- Config Spec-Kit pour Spec-Driven Development - CONSTITUTION.md + .specify/memory/constitution.md - Commandes Cursor /speckit.*, règles projet - Mission: associations + mutuelles d'épargne et de financement - .gitignore: versionner config spec-kit unionflow Made-with: Cursor
2026-02-27 14:41:07 +00:00
parent 144b68f8e7
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+# UnionFlow Project Constitution
+
+> **Version:** 1.0
+> **Date:** 2026-02-27
+> **Status:** Active
+> **Scope:** Backend (unionflow-server-impl-quarkus), API (unionflow-server-api), Mobile (unionflow-mobile-apps)
+
+---
+
+## 🎯 Mission & Vision
+
+**Mission:** Fournir une plateforme complète et sécurisée pour la gestion d'associations, clubs et organisations à but non lucratif, et **pour la gestion des mutuelles d'épargne et de financement**.
+
+**Vision:** Architecture DDD stricte, séparation claire API/Implementation, conformité RGPD, et qualité industrielle (100% test coverage).
+
+---
+
+## 📐 Architecture Principles
+
+### 1. Domain-Driven Design (DDD) - STRICT
+
+#### 1.1 Layered Architecture
+```
+┌─────────────────────────────────────────┐
+│  Presentation Layer (Resources/API)     │  ← JAX-RS REST endpoints
+├─────────────────────────────────────────┤
+│  Application Layer (Services)           │  ← Business logic, transactions
+├─────────────────────────────────────────┤
+│  Domain Layer (Entities)                │  ← Rich domain models
+├─────────────────────────────────────────┤
+│  Infrastructure Layer (Repositories)    │  ← Data persistence (Panache)
+└─────────────────────────────────────────┘
+```
+
+**Rules:**
+- ✅ **DO**: Resources call Services, Services use Repositories
+- ❌ **DON'T**: Resources directly access Repositories
+- ❌ **DON'T**: Entities contain business logic beyond validation
+- ✅ **DO**: All business logic lives in Services
+
+#### 1.2 Entity Pattern
+- **Base Class**: All entities extend `BaseEntity`
+  ```java
+  @MappedSuperclass
+  public abstract class BaseEntity {
+      @Id UUID id;
+      LocalDateTime dateCreation;
+      LocalDateTime dateModification;
+      String creePar;
+      String modifiePar;
+      Long version;  // Optimistic locking
+      Boolean actif;  // Soft delete
+  }
+  ```
+- **Lifecycle Hooks**: `@PrePersist`, `@PreUpdate` for audit trail
+- **Immutability**: Use Lombok `@Builder` for construction
+- **Validation**: Jakarta Bean Validation annotations on fields
+
+#### 1.3 Repository Pattern
+- **Technology**: Hibernate Panache `PanacheRepositoryBase<Entity, UUID>`
+- **Naming**: `{Entity}Repository` (e.g., `MembreRepository`)
+- **Custom Queries**: Native queries for complex business logic
+- **Pagination**: Use `Page` and `Sort` from Panache
+- **No Logic**: Repositories are ONLY for data access, no business rules
+
+#### 1.4 Service Pattern
+- **Naming**: `{Domain}Service` (e.g., `MembreService`, `CotisationService`)
+- **Transactions**: All mutating methods MUST be `@Transactional`
+- **Logging**: Use `Logger.getLogger(...)` for all service operations
+- **Error Handling**: Throw domain exceptions (`NotFoundException`, `IllegalArgumentException`)
+- **Security**: Inject `KeycloakService` for authorization checks
+
+---
+
+### 2. API/Implementation Separation - MANDATORY
+
+#### 2.1 Module Structure
+```
+unionflow/
+├── unionflow-server-api/          ← Pure Java 17, no dependencies
+│   ├── dto/
+│   │   ├── request/                ← Java records with validation
+│   │   └── response/               ← Java records (immutable DTOs)
+│   └── enums/                      ← Rich enums with business methods
+│
+└── unionflow-server-impl-quarkus/ ← Quarkus 3.15.1 implementation
+    ├── entity/                     ← JPA entities
+    ├── repository/                 ← Panache repositories
+    ├── service/                    ← Business logic
+    ├── resource/                   ← JAX-RS endpoints
+    ├── mapper/                     ← MapStruct mappers
+    └── security/                   ← Security config
+```
+
+#### 2.2 API Module Rules
+- ✅ **DO**: Use Java `record` for all DTOs (request/response)
+- ✅ **DO**: Use `@Builder` from Lombok for records
+- ✅ **DO**: Validation annotations (`@NotNull`, `@Size`, `@Pattern`, etc.)
+- ❌ **DON'T**: Any runtime dependencies (no Quarkus, no JPA)
+- ❌ **DON'T**: Mutable DTOs (records are immutable)
+
+**Example Request DTO:**
+```java
+@Builder
+public record CreateMembreRequest(
+    @NotBlank @Size(max = 100) String nom,
+    @NotBlank @Size(max = 100) String prenom,
+    @Email String email,
+    @NotNull LocalDate dateNaissance
+) {}
+```
+
+#### 2.3 Impl Module Rules
+- ✅ **DO**: Depend on `unionflow-server-api` for DTOs
+- ✅ **DO**: Use MapStruct for Entity ↔ DTO conversion
+- ❌ **DON'T**: Return entities directly from Resources (always map to DTOs)
+- ❌ **DON'T**: Accept entities in Resource methods (use DTOs)
+
+---
+
+### 3. Security - NON-NEGOTIABLE
+
+#### 3.1 Authentication & Authorization
+- **Provider**: Keycloak 23+ (OIDC/OAuth2)
+- **Realm**: `unionflow`
+- **Client**: `unionflow-mobile` (confidential)
+- **Token Type**: JWT (signed, encrypted)
+
+#### 3.2 JWT Validation Strategy
+| Layer | Validation |
+|-------|------------|
+| **Mobile** | Issuer (`iss`) + Expiry (`exp`) |
+| **Backend** | Signature verification + Claims extraction |
+
+**Rationale**: Mobile cannot verify JWT signatures securely (no secret storage), so backend is authoritative for signature validation.
+
+#### 3.3 Role-Based Access Control (RBAC)
+**Defined Roles** (in `SecurityConfig.Roles`):
+1. `ADMIN` - Full system access
+2. `PRESIDENT` - Organization management
+3. `VICE_PRESIDENT` - Deputy authority
+4. `TRESORIER` - Financial operations
+5. `SECRETAIRE` - Administrative operations
+6. `GESTIONNAIRE_MEMBRE` - Member management
+7. `ORGANISATEUR_EVENEMENT` - Event management
+8. `GESTIONNAIRE_SOLIDARITE` - Solidarity aid management
+9. `AUDITEUR` - Read-only audit access
+10. `MEMBRE` - Basic member access
+
+**Permission Checks**:
+```java
+// In Services
+if (!keycloakService.hasRole("ADMIN") &&
+    !keycloakService.hasRole("GESTIONNAIRE_MEMBRE")) {
+    throw new SecurityException("Insufficient permissions");
+}
+
+// In Resources
+@RolesAllowed({"ADMIN", "TRESORIER"})
+@GET
+public Response getFinancialData() { ... }
+```
+
+#### 3.4 RGPD Compliance
+- **Audit Trail**: All entities track `creePar`, `modifiePar`, dates
+- **Soft Delete**: Use `actif=false` instead of hard deletes
+- **Data Minimization**: Only collect necessary fields
+- **Right to be Forgotten**: Anonymization service (planned)
+- **Consent Management**: Explicit opt-in for communications
+
+#### 3.5 Transport Security
+- **HTTPS Only**: All external traffic via TLS 1.3+
+- **Certificate Management**: Let's Encrypt + Cert-Manager (K8s)
+- **Ingress**: nginx ingress controller with SSL termination
+- **Mobile**: `network_security_config.xml` blocks cleartext HTTP
+
+---
+
+### 4. Data Management
+
+#### 4.1 Database Strategy
+- **Production**: PostgreSQL 15+
+- **Testing**: H2 in-memory
+- **Schema Management**: Flyway migrations
+- **Connection Pooling**: HikariCP (via Quarkus)
+
+#### 4.2 Migration Policy
+- **Versioning**: `V{major}.{minor}__{description}.sql`
+- **Current**: `V2.0__create_all_37_entities.sql`
+- **Rules**:
+  - ❌ NEVER modify existing migrations
+  - ✅ Always create new migration for schema changes
+  - ✅ Test migrations on staging before production
+  - ✅ Migrations must be idempotent where possible
+
+#### 4.3 Primary Keys
+- **Type**: `UUID` (UUIDv4)
+- **Generation**: Database-generated (`gen_random_uuid()`)
+- **Foreign Keys**: Always use UUIDs
+- **Rationale**: Distributed system compatibility, no ID enumeration attacks
+
+#### 4.4 Optimistic Locking
+- **Field**: `@Version Long version` in `BaseEntity`
+- **Behavior**: Automatic conflict detection on concurrent updates
+- **Exception**: `OptimisticLockException` → HTTP 409 Conflict
+
+---
+
+### 5. Quality Assurance
+
+#### 5.1 Test Coverage Requirements
+**JaCoCo Thresholds (STRICT - NO EXCEPTIONS):**
+- ✅ Instructions: **100%**
+- ✅ Branches: **100%**
+- ✅ Lines: **100%**
+- ✅ Methods: **100%**
+
+**Configuration:**
+```xml
+<rules>
+  <rule><limits>
+    <limit><counter>INSTRUCTION</counter><minimum>1.00</minimum></limit>
+    <limit><counter>BRANCH</counter><minimum>1.00</minimum></limit>
+    <limit><counter>LINE</counter><minimum>1.00</minimum></limit>
+    <limit><counter>METHOD</counter><minimum>1.00</minimum></limit>
+  </limits></rule>
+</rules>
+<haltOnFailure>true</haltOnFailure>
+```
+
+**Exclusions**: NONE (including mappers, generated code)
+
+#### 5.2 Test Patterns
+**Service Tests:**
+```java
+@QuarkusTest
+class MembreServiceTest {
+    @Inject MembreService service;
+
+    @BeforeEach
+    void setup() {
+        // Setup via service calls (own @Transactional)
+    }
+
+    @Test
+    @TestTransaction  // Rollback after test
+    void testMethod() { ... }
+}
+```
+
+**Resource Tests:**
+```java
+@QuarkusTest
+class MembreResourceTest {
+    @Test
+    @TestSecurity(user = "admin@test.com", roles = {"ADMIN"})
+    void testEndpoint() {
+        given()
+            .when().get("/api/membres")
+            .then().statusCode(200);
+    }
+}
+```
+
+**Entity Tests:**
+```java
+class MembreTest {
+    @Test
+    void testPrePersist() {
+        Membre m = new Membre();
+        // Invoke @PrePersist via reflection
+        m.prePersist();
+        assertThat(m.getDateCreation()).isNotNull();
+    }
+}
+```
+
+#### 5.3 Test Organization
+- **Location**: `src/test/java` mirroring `src/main/java` structure
+- **Naming**: `{ClassName}Test.java`
+- **DisplayName**: French, descriptive (`@DisplayName("crée un membre valide")`)
+- **Assertions**: AssertJ (`assertThat(...).isNotNull()`)
+
+---
+
+### 6. Configuration Management
+
+#### 6.1 Environment Profiles
+| Profile | Purpose | DB | Keycloak | Logs |
+|---------|---------|----|----------|------|
+| **dev** | Local development | H2 | localhost:8180 | Console |
+| **test** | Automated tests | H2 | Mock (@TestSecurity) | Suppressed |
+| **staging** | Pre-production | PostgreSQL | staging.lions.dev | File + Console |
+| **prod** | Production | PostgreSQL | security.lions.dev | File only |
+
+#### 6.2 Configuration Hierarchy
+```
+1. application.properties (defaults)
+2. application-{profile}.properties (overrides)
+3. Environment variables (highest priority)
+```
+
+**Example:**
+```properties
+# application.properties
+quarkus.datasource.jdbc.url=jdbc:postgresql://localhost:5432/unionflow
+
+# application-prod.properties
+quarkus.datasource.jdbc.url=jdbc:postgresql://postgresql-service.postgresql.svc.cluster.local:5432/unionflow
+
+# Environment variable (highest priority)
+QUARKUS_DATASOURCE_JDBC_URL=jdbc:postgresql://custom-host:5432/unionflow
+```
+
+#### 6.3 Secrets Management
+- ❌ **NEVER** commit secrets to git
+- ✅ Use environment variables for production secrets
+- ✅ Use Kubernetes Secrets in K8s deployments
+- ✅ Use `.env` files locally (in `.gitignore`)
+
+**Example Kubernetes Secret:**
+```yaml
+apiVersion: v1
+kind: Secret
+metadata:
+  name: unionflow-secrets
+type: Opaque
+data:
+  keycloak-client-secret: <base64>
+  database-password: <base64>
+```
+
+---
+
+### 7. Logging & Monitoring
+
+#### 7.1 Logging Standards
+**Levels:**
+- `ERROR`: System failures requiring immediate attention
+- `WARN`: Recoverable errors, deprecated usage
+- `INFO`: Business events (user login, payment, etc.)
+- `DEBUG`: Detailed diagnostic info (dev/staging only)
+- `TRACE`: Ultra-verbose (never in production)
+
+**Format:**
+```java
+LOG.infof("Membre créé: ID=%s, Email=%s", membre.getId(), membre.getEmail());
+LOG.warnf("Tentative d'accès non autorisé: User=%s, Resource=%s", user, resource);
+LOG.error("Erreur connexion base de données", exception);
+```
+
+#### 7.2 Production Logging
+- **File**: `/var/log/unionflow/app.log` (rotated daily)
+- **Console**: Disabled in production
+- **JSON Format**: For log aggregation (ELK stack)
+- **Sensitive Data**: NEVER log passwords, tokens, personal data
+
+#### 7.3 Metrics & Health
+- **Endpoints**:
+  - `/q/health` - Health check
+  - `/q/health/live` - Liveness probe
+  - `/q/health/ready` - Readiness probe
+  - `/q/metrics` - Prometheus metrics
+- **K8s Probes**: Configured for all 3 health endpoints
+
+---
+
+### 8. API Design
+
+#### 8.1 RESTful Conventions
+| Method | Path | Purpose | Status |
+|--------|------|---------|--------|
+| `GET` | `/api/membres` | List all | 200 |
+| `GET` | `/api/membres/{id}` | Get one | 200 / 404 |
+| `POST` | `/api/membres` | Create | 201 |
+| `PUT` | `/api/membres/{id}` | Full update | 200 / 404 |
+| `PATCH` | `/api/membres/{id}` | Partial update | 200 / 404 |
+| `DELETE` | `/api/membres/{id}` | Soft delete | 204 / 404 |
+
+#### 8.2 Response Formats
+**Success (200/201):**
+```json
+{
+  "id": "uuid",
+  "nom": "Dupont",
+  "prenom": "Jean",
+  "email": "jean.dupont@example.com"
+}
+```
+
+**Error (4xx/5xx):**
+```json
+{
+  "timestamp": "2026-02-27T10:30:00Z",
+  "status": 404,
+  "error": "Not Found",
+  "message": "Membre non trouvé avec l'ID: {id}",
+  "path": "/api/membres/{id}"
+}
+```
+
+#### 8.3 Pagination
+```
+GET /api/membres?page=0&size=20&sort=nom,asc
+```
+
+**Response Headers:**
+```
+X-Total-Count: 150
+Link: </api/membres?page=1&size=20>; rel="next"
+```
+
+#### 8.4 Versioning
+- **Strategy**: URL versioning (future)
+- **Current**: No versioning (v1 implicit)
+- **Future**: `/api/v2/membres` for breaking changes
+
+---
+
+### 9. Deployment & DevOps
+
+#### 9.1 Container Strategy
+- **Base Image**: `registry.access.redhat.com/ubi9/openjdk-17-runtime:1.20`
+- **Multi-stage Build**: Maven build → JVM runtime
+- **Port**: 8080 (internal), 443 (external via ingress)
+- **Healthcheck**: `/q/health/live` every 30s
+
+#### 9.2 Kubernetes Deployment
+**Namespace Strategy:**
+- `applications` - User-facing apps (unionflow-server, lions-user-manager)
+- `infrastructure` - Supporting services (postgresql, keycloak)
+- `monitoring` - Observability (prometheus, grafana)
+
+**Resource Limits:**
+```yaml
+resources:
+  requests:
+    memory: "512Mi"
+    cpu: "250m"
+  limits:
+    memory: "1Gi"
+    cpu: "1000m"
+```
+
+#### 9.3 Deployment Pipeline (lionsctl)
+```bash
+lionsctl pipeline \
+  -u https://git.lions.dev/lionsdev/unionflow-server-impl-quarkus \
+  -b main \
+  -j 17 \
+  -e production \
+  -c k1 \
+  -p prod
+```
+
+**Steps:**
+1. Clone from Gitea
+2. `mvn clean package -Pprod`
+3. `docker build -t registry.lions.dev/lionsdev/unionflow-server:{tag}`
+4. `docker push registry.lions.dev/lionsdev/unionflow-server:{tag}`
+5. `kubectl apply -f k8s/deployment.yaml`
+6. Health check validation
+7. Email notification
+
+#### 9.4 Rollback Strategy
+- **Version Tags**: Every build tagged with git commit SHA
+- **Immutable Images**: Never overwrite existing tags
+- **Rollback**: `kubectl rollout undo deployment/unionflow-server`
+
+---
+
+### 10. Code Conventions
+
+#### 10.1 Naming Conventions
+| Type | Convention | Example |
+|------|------------|---------|
+| **Packages** | `dev.lions.unionflow.server.{layer}` | `dev.lions.unionflow.server.service` |
+| **Classes** | PascalCase, singular | `MembreService`, `Cotisation` |
+| **Interfaces** | No `I` prefix | `Repository`, not `IRepository` |
+| **Methods** | camelCase, verb-first | `creerMembre()`, `trouverParId()` |
+| **Constants** | UPPER_SNAKE_CASE | `MAX_RETRY_ATTEMPTS` |
+| **Variables** | camelCase | `membre`, `listeMembres` |
+
+#### 10.2 Language
+- **Code**: English for technical terms (class names, method names)
+- **Business Domain**: French (`Membre`, `Cotisation`, `Adhesion`)
+- **Comments/Javadoc**: French
+- **Logs**: French
+- **Git Commits**: French
+
+**Rationale**: Business domain in French for client alignment, technical terms in English for global compatibility.
+
+#### 10.3 Lombok Usage
+**Allowed:**
+- `@Data` (entities)
+- `@Builder` (DTOs, entities)
+- `@Getter` / `@Setter`
+- `@NoArgsConstructor` / `@AllArgsConstructor`
+- `@Slf4j` (AVOID - use standard logger)
+
+**Forbidden:**
+- `@SneakyThrows` (hides exceptions)
+- `@Cleanup` (use try-with-resources)
+- `@val` (use explicit types)
+
+#### 10.4 Code Formatting
+- **Indentation**: 2 spaces (NOT tabs)
+- **Line Length**: 120 characters max
+- **Braces**: Always use braces, even for single-line if/for
+- **Import Order**: java.*, javax.*, jakarta.*, org.*, dev.lions.*, (blank), static imports
+
+---
+
+### 11. Error Handling
+
+#### 11.1 Exception Hierarchy
+```
+RuntimeException
+├── IllegalArgumentException      (400 Bad Request)
+├── NotFoundException            (404 Not Found)
+├── SecurityException            (403 Forbidden)
+├── IllegalStateException        (409 Conflict)
+└── UnsupportedOperationException (501 Not Implemented)
+```
+
+#### 11.2 Exception Mapping
+```java
+@Provider
+public class GlobalExceptionMapper implements ExceptionMapper<Exception> {
+    @Override
+    public Response toResponse(Exception e) {
+        if (e instanceof NotFoundException) {
+            return Response.status(404).entity(error(e)).build();
+        }
+        // ... autres cas
+        return Response.status(500).entity(error(e)).build();
+    }
+}
+```
+
+#### 11.3 Validation Errors
+```java
+@POST
+public Response create(@Valid CreateMembreRequest request) {
+    // Validation automatique par Jakarta Bean Validation
+    // 400 Bad Request si validation échoue
+}
+```
+
+---
+
+### 12. Performance
+
+#### 12.1 Database Performance
+- **Indexes**: On all foreign keys, frequently queried columns
+- **N+1 Queries**: Use `@EntityGraph` or JOIN FETCH
+- **Pagination**: ALWAYS paginate large result sets
+- **Connection Pool**: Min 5, Max 20 connections
+
+#### 12.2 Caching Strategy
+- **Level 1 Cache**: Hibernate session cache (automatic)
+- **Level 2 Cache**: Disabled (stateless REST API)
+- **Application Cache**: Caffeine for frequently accessed data (ex: roles, permissions)
+- **HTTP Cache**: `Cache-Control` headers for static resources
+
+#### 12.3 Query Optimization
+```java
+// ❌ BAD - N+1 queries
+List<Membre> membres = membreRepository.findAll();
+membres.forEach(m -> m.getCotisations().size()); // Lazy load
+
+// ✅ GOOD - Single query with JOIN FETCH
+@Query("SELECT m FROM Membre m LEFT JOIN FETCH m.cotisations")
+List<Membre> findAllWithCotisations();
+```
+
+---
+
+### 13. Mobile Integration
+
+#### 13.1 Mobile App Configuration
+**Flutter Environment:**
+```dart
+// lib/config/environment.dart
+abstract class AppConfig {
+  static String get apiBaseUrl => const String.fromEnvironment('API_URL');
+  static String get keycloakUrl => const String.fromEnvironment('KEYCLOAK_URL');
+  static bool get enableLogging => const String.fromEnvironment('ENV') != 'prod';
+}
+```
+
+**Build Command:**
+```bash
+flutter build apk \
+  --dart-define=ENV=prod \
+  --dart-define=API_URL=https://api.lions.dev \
+  --dart-define=KEYCLOAK_URL=https://security.lions.dev
+```
+
+#### 13.2 OAuth2 Flow (Mobile)
+```
+1. App → Keycloak: Authorization request
+2. User authenticates in browser
+3. Keycloak → App: Authorization code (via deep link)
+4. App → Backend: Exchange code for tokens
+5. Backend validates, returns JWT
+6. App stores JWT securely (flutter_secure_storage)
+```
+
+#### 13.3 Deep Link Configuration
+- **Scheme**: `dev.lions.unionflow-mobile://`
+- **Callback**: `dev.lions.unionflow-mobile://callback`
+- **Android**: Handled via `network_security_config.xml`
+- **iOS**: Handled via `Info.plist`
+
+---
+
+### 14. Change Management
+
+#### 14.1 Git Workflow
+- **Branches**: `main` (production), `develop` (integration), `feature/*`, `fix/*`
+- **Commits**: Conventional Commits format
+  ```
+  type(scope): description
+
+  [optional body]
+
+  Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
+  ```
+- **Types**: `feat`, `fix`, `docs`, `refactor`, `test`, `chore`
+- **PR Required**: All merges to `main` require PR + review
+
+#### 14.2 Database Migrations
+**Process:**
+1. Create migration: `V{version}__{description}.sql`
+2. Test locally on H2
+3. Test on staging PostgreSQL
+4. Include in PR for review
+5. Deploy to production with rollback plan
+
+#### 14.3 Breaking Changes
+**Definition**: Changes that break existing API contracts
+- ❌ Removing fields from DTOs
+- ❌ Changing field types
+- ❌ Removing endpoints
+- ❌ Changing authentication flow
+
+**Mitigation:**
+1. Version the API (`/api/v2/...`)
+2. Deprecate old version with 6-month sunset
+3. Communicate to mobile team 3 months in advance
+
+---
+
+### 15. Documentation
+
+#### 15.1 Required Documentation
+- ✅ **OpenAPI/Swagger**: Auto-generated from JAX-RS annotations
+- ✅ **Javadoc**: All public methods in Services
+- ✅ **README.md**: Per-module setup instructions
+- ✅ **CONSTITUTION.md**: This document
+- ✅ **CHANGELOG.md**: Release notes
+
+#### 15.2 API Documentation
+**Access**: `https://api.lions.dev/unionflow/q/swagger-ui`
+
+**Annotations:**
+```java
+@Path("/membres")
+@Tag(name = "Membres", description = "Gestion des membres")
+public class MembreResource {
+
+    @GET
+    @Operation(summary = "Liste tous les membres")
+    @APIResponse(responseCode = "200", description = "Succès")
+    public Response list() { ... }
+}
+```
+
+---
+
+### 16. Compliance & Governance
+
+#### 16.1 RGPD Requirements
+- **Data Minimization**: Only collect necessary data
+- **Purpose Limitation**: Use data only for stated purposes
+- **Storage Limitation**: Delete data after retention period
+- **Accuracy**: Allow users to update their data
+- **Integrity**: Encrypt data at rest and in transit
+- **Confidentiality**: Role-based access control
+
+#### 16.2 Audit Trail
+**Tracked Fields:**
+- `creePar` - User who created the record
+- `modifiePar` - User who last modified
+- `dateCreation` - Creation timestamp
+- `dateModification` - Last modification timestamp
+
+**Retention**: 7 years minimum (legal requirement for associations)
+
+#### 16.3 Data Retention Policy
+| Data Type | Retention Period | Action After |
+|-----------|------------------|--------------|
+| **Member Data** | Active + 2 years | Anonymize |
+| **Financial Records** | 10 years | Archive |
+| **Audit Logs** | 7 years | Archive |
+| **Session Tokens** | 24 hours | Delete |
+
+---
+
+## 🔄 Amendment Process
+
+This constitution is a living document. Amendments require:
+
+1. **Proposal**: Submit PR with changes to `CONSTITUTION.md`
+2. **Discussion**: Team review (minimum 3 business days)
+3. **Approval**: Unanimous approval from tech leads
+4. **Implementation**: Update dependent documentation
+5. **Communication**: Announce changes to all teams
+
+**Version History:**
+- v1.0 (2026-02-27): Initial constitution
+
+---
+
+## 📞 Contacts & Resources
+
+- **Tech Lead**: [À définir]
+- **Repository**: `https://git.lions.dev/lionsdev/unionflow-server-impl-quarkus`
+- **Documentation**: `https://docs.lions.dev/unionflow`
+- **Deployment Tool**: `lionsctl` (`lions-infrastructure-2025/lionsctl/`)
+- **Support**: `support@lions.dev`
+
+---
+
+**Last Updated**: 2026-02-27
+**Next Review**: 2026-05-27 (quarterly review)