feat: Initial lions-user-manager project structure

Phase 1 & 2 Implementation (40% completion)

Module server-api (✅ COMPLETED - 15 files):
- DTOs complets (User, Role, Audit, Search)
- Enums (StatutUser, TypeRole, TypeActionAudit)
- Service interfaces (User, Role, Audit, Sync)
- ValidationConstants
- 100% compilé et testé

Module server-impl-quarkus (🔄 EN COURS - 7 files):
- KeycloakAdminClient avec Circuit Breaker, Retry, Timeout
- UserServiceImpl avec 25+ méthodes
- UserResource REST API (12 endpoints)
- Health checks Keycloak
- Configurations dev/prod séparées
- Mappers UserDTO <-> Keycloak UserRepresentation

Module client (⏳ À FAIRE - 0 files):
- Configuration PrimeFaces Freya à venir
- Interface utilisateur JSF à venir

Infrastructure:
- Maven multi-modules (parent + 3 enfants)
- Quarkus 3.15.1
- Keycloak Admin Client 23.0.3
- PrimeFaces 14.0.5
- Documentation complète (README, PROGRESS_REPORT)

Contraintes respectées:
- ZÉRO accès direct DB Keycloak (Admin API uniquement)
- Multi-realm avec délégation
- Résilience (Circuit Breaker, Retry)
- Sécurité (@RolesAllowed, OIDC)
- Observabilité (Health, Metrics)

🤖 Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>

lions-user-manager-server-api/pom.xml

@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>dev.lions.user.manager</groupId>
+        <artifactId>lions-user-manager-parent</artifactId>
+        <version>1.0.0</version>
+    </parent>
+
+    <artifactId>lions-user-manager-server-api</artifactId>
+    <packaging>jar</packaging>
+
+    <name>Lions User Manager - Server API</name>
+    <description>Contrats API: DTOs, interfaces de services, enums et validations</description>
+
+    <dependencies>
+        <!-- Lombok -->
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+        </dependency>
+
+        <!-- Jakarta EE APIs -->
+        <dependency>
+            <groupId>jakarta.validation</groupId>
+            <artifactId>jakarta.validation-api</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>jakarta.ws.rs</groupId>
+            <artifactId>jakarta.ws.rs-api</artifactId>
+        </dependency>
+
+        <!-- Jackson for JSON -->
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-annotations</artifactId>
+        </dependency>
+
+        <!-- OpenAPI annotations -->
+        <dependency>
+            <groupId>org.eclipse.microprofile.openapi</groupId>
+            <artifactId>microprofile-openapi-api</artifactId>
+        </dependency>
+
+        <!-- Testing -->
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+</project>