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/api/__init__.py

@@ -0,0 +1,17 @@
+"""
+API routes module.
+
+This package contains all FastAPI route handlers.
+"""
+from app.api.deps import get_db_session, require_auth
+from app.api.ssh_keys import router as ssh_keys_router
+from app.api.servers import router as servers_router
+from app.api.status import router as status_router
+
+__all__ = [
+    "get_db_session",
+    "require_auth",
+    "ssh_keys_router",
+    "servers_router",
+    "status_router",
+]