feat: BackupService real pg_dump, OrganisationService region stats, SystemConfigService overrides

- BackupService: DB-persisted metadata (BackupRecord/BackupConfig entities + V16 Flyway migration),
  real pg_dump execution via ProcessBuilder, soft-delete on deleteBackup, pg_restore manual guidance
- OrganisationService: repartitionRegion now queries Adresse entities (was Map.of() stub)
- SystemConfigService: in-memory config overrides via AtomicReference (no DB dependency)
- SystemMetricsService: null-guard on MemoryMXBean in getSystemStatus() (fixes test NPE)
- Souscription workflow: SouscriptionService, SouscriptionResource, FormuleAbonnementRepository,
  V11 Flyway migration, admin REST clients
- Flyway V8-V15: notes membres, types référence, type orga constraint, seed roles,
  première connexion, Wave checkout URL, Wave telephone column length fix
- .gitignore: added uploads/ and .claude/

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/main/java/dev/lions/unionflow/server/entity/Membre.java

@@ -59,8 +59,8 @@ public class Membre extends BaseEntity {
   @Column(name = "telephone", length = 20)
   private String telephone;
 
-  @Pattern(regexp = "^\\+225[0-9]{8}$", message = "Le numéro Wave doit être au format +225XXXXXXXX")
-  @Column(name = "telephone_wave", length = 13)
+  @Pattern(regexp = "^\\+[1-9][0-9]{6,14}$", message = "Le numéro Wave doit être au format international E.164 (ex: +22507XXXXXXXX)")
+  @Column(name = "telephone_wave", length = 20)
   private String telephoneWave;
 
   @NotNull
@@ -77,6 +77,11 @@ public class Membre extends BaseEntity {
   @Column(name = "statut_compte", nullable = false, length = 30)
   private String statutCompte = "EN_ATTENTE_VALIDATION";
 
+  /** Vrai si le membre n'a jamais changé son mot de passe généré par l'admin. */
+  @Builder.Default
+  @Column(name = "premiere_connexion", nullable = false)
+  private Boolean premiereConnexion = true;
+
   /**
    * Statut matrimonial (domaine
    * {@code STATUT_MATRIMONIAL} dans
@@ -101,6 +106,10 @@ public class Membre extends BaseEntity {
   @Column(name = "numero_identite", length = 100)
   private String numeroIdentite;
 
+  /** Notes / biographie libre du membre. */
+  @Column(name = "notes", length = 1000)
+  private String notes;
+
   /** Niveau de vigilance KYC LCB-FT (SIMPLIFIE, RENFORCE). */
   @Column(name = "niveau_vigilance_kyc", length = 20)
   private String niveauVigilanceKyc;