feat: complete Git Repo Manager MVP implementation

Backend (Phase 1-6):
- Pydantic schemas for request/response validation
- Service layer (SSH Key, Server, Repo, Sync)
- API routes with authentication
- FastAPI main application with lifespan management
- ORM models (SshKey, Server, Repo, SyncLog)

Frontend (Phase 7):
- Vue 3 + Element Plus + Pinia + Vue Router
- API client with Axios and interceptors
- State management stores
- All page components (Dashboard, Servers, Repos, SyncLogs, SshKeys, Settings)

Deployment (Phase 8):
- README with quick start guide
- Startup script (start.sh)

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

backend/app/services/__init__.py

@@ -5,5 +5,7 @@ Business logic layer for application services.
 """
 from app.services.ssh_key_service import SshKeyService
 from app.services.server_service import ServerService
+from app.services.sync_service import SyncService
+from app.services.repo_service import RepoService
 
-__all__ = ['SshKeyService', 'ServerService']
+__all__ = ['SshKeyService', 'ServerService', 'SyncService', 'RepoService']