feat: WebSocket temps réel + Finance Workflow + corrections

- Task #6: WebSocket /ws/dashboard + Kafka events (5 topics)
  * Backend: KafkaEventProducer, KafkaEventConsumer
  * Mobile: WebSocketService (reconnection, heartbeat, typed events)
  * DashboardBloc: Auto-refresh depuis WebSocket events

- Finance Workflow: approbations + budgets (backend + mobile)
  * Backend: entities, services, resources, migrations Flyway V6
  * Mobile: features finance_workflow complète avec BLoC

- Corrections DI: interfaces IRepository partout
  * IProfileRepository, IOrganizationRepository, IMembreRepository
  * GetIt configuré avec @injectable

- Spec-Kit: constitution + templates mis à jour
  * .specify/memory/constitution.md enrichie
  * Templates agent, plan, spec, tasks, checklist

- Nettoyage: fichiers temporaires supprimés

Signed-off-by: lions dev Team

unionflow/unionflow-mobile-apps/lib/features/solidarity/bloc/solidarity_event.dart

@@ -47,7 +47,8 @@ class ApprouverDemandeAide extends SolidarityEvent {
 
 class RejeterDemandeAide extends SolidarityEvent {
   final String id;
-  const RejeterDemandeAide(this.id);
+  final String? motif;
+  const RejeterDemandeAide(this.id, {this.motif});
   @override
-  List<Object?> get props => [id];
+  List<Object?> get props => [id, motif];
 }