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
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