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/resource/BudgetResource.java

@@ -36,7 +36,7 @@ public class BudgetResource {
     BudgetService budgetService;
 
     @GET
-    @RolesAllowed({"ORG_ADMIN", "SUPER_ADMIN"})
+    @RolesAllowed({"ADMIN_ORGANISATION", "SUPER_ADMIN"})
     @Operation(summary = "Récupère les budgets",
                description = "Liste tous les budgets d'une organisation avec filtres optionnels")
     public Response getBudgets(
@@ -63,7 +63,7 @@ public class BudgetResource {
 
     @GET
     @Path("/{budgetId}")
-    @RolesAllowed({"ORG_ADMIN", "SUPER_ADMIN"})
+    @RolesAllowed({"ADMIN_ORGANISATION", "SUPER_ADMIN"})
     @Operation(summary = "Récupère un budget par ID",
                description = "Retourne les détails complets d'un budget")
     public Response getBudgetById(@PathParam("budgetId") UUID budgetId) {
@@ -85,7 +85,7 @@ public class BudgetResource {
     }
 
     @POST
-    @RolesAllowed({"ORG_ADMIN", "SUPER_ADMIN"})
+    @RolesAllowed({"ADMIN_ORGANISATION", "SUPER_ADMIN"})
     @Operation(summary = "Crée un nouveau budget",
                description = "Crée un budget avec ses lignes budgétaires")
     public Response createBudget(@Valid CreateBudgetRequest request) {
@@ -114,7 +114,7 @@ public class BudgetResource {
 
     @GET
     @Path("/{budgetId}/tracking")
-    @RolesAllowed({"ORG_ADMIN", "SUPER_ADMIN"})
+    @RolesAllowed({"ADMIN_ORGANISATION", "SUPER_ADMIN"})
     @Operation(summary = "Récupère le suivi budgétaire",
                description = "Retourne les statistiques de suivi et réalisation du budget")
     public Response getBudgetTracking(@PathParam("budgetId") UUID budgetId) {
@@ -137,7 +137,7 @@ public class BudgetResource {
 
     @PUT
     @Path("/{budgetId}")
-    @RolesAllowed({"ORG_ADMIN", "SUPER_ADMIN"})
+    @RolesAllowed({"ADMIN_ORGANISATION", "SUPER_ADMIN"})
     @Operation(summary = "Met à jour un budget",
                description = "Modifie un budget existant (nom, description, lignes, statut)")
     public Response updateBudget(
@@ -166,7 +166,7 @@ public class BudgetResource {
 
     @DELETE
     @Path("/{budgetId}")
-    @RolesAllowed({"ORG_ADMIN", "SUPER_ADMIN"})
+    @RolesAllowed({"ADMIN_ORGANISATION", "SUPER_ADMIN"})
     @Operation(summary = "Supprime un budget",
                description = "Supprime logiquement un budget (soft delete)")
     public Response deleteBudget(@PathParam("budgetId") UUID budgetId) {