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/backup/data/models/backup_model.dart

@@ -0,0 +1,69 @@
+/// Modèle de sauvegarde
+/// Correspond à BackupResponse du backend
+library backup_model;
+
+import 'package:equatable/equatable.dart';
+import 'package:json_annotation/json_annotation.dart';
+
+part 'backup_model.g.dart';
+
+@JsonSerializable(explicitToJson: true)
+class BackupModel extends Equatable {
+  final String? id;
+  final String? name;
+  final String? description;
+  final String? type; // AUTO, MANUAL, RESTORE_POINT
+  final int? sizeBytes;
+  final String? sizeFormatted;
+  final String? status; // PENDING, IN_PROGRESS, COMPLETED, FAILED
+  final DateTime? createdAt;
+  final DateTime? completedAt;
+  final String? createdBy;
+  final bool? includesDatabase;
+  final bool? includesFiles;
+  final bool? includesConfiguration;
+  final String? filePath;
+  final String? errorMessage;
+
+  const BackupModel({
+    this.id,
+    this.name,
+    this.description,
+    this.type,
+    this.sizeBytes,
+    this.sizeFormatted,
+    this.status,
+    this.createdAt,
+    this.completedAt,
+    this.createdBy,
+    this.includesDatabase,
+    this.includesFiles,
+    this.includesConfiguration,
+    this.filePath,
+    this.errorMessage,
+  });
+
+  factory BackupModel.fromJson(Map<String, dynamic> json) =>
+      _$BackupModelFromJson(json);
+
+  Map<String, dynamic> toJson() => _$BackupModelToJson(this);
+
+  @override
+  List<Object?> get props => [
+        id,
+        name,
+        description,
+        type,
+        sizeBytes,
+        sizeFormatted,
+        status,
+        createdAt,
+        completedAt,
+        createdBy,
+        includesDatabase,
+        includesFiles,
+        includesConfiguration,
+        filePath,
+        errorMessage,
+      ];
+}