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/schemas/__init__.py

@@ -0,0 +1,38 @@
+"""
+Pydantic schemas for API request/response validation.
+
+This module exports all schemas used throughout the application.
+"""
+
+# Common schemas
+from app.schemas.common import SuccessResponse, ErrorResponse
+
+# SSH Key schemas
+from app.schemas.ssh_key import SshKeyCreate, SshKeyResponse
+
+# Server schemas
+from app.schemas.server import ServerCreate, ServerUpdate, ServerResponse
+
+# Repository schemas
+from app.schemas.repo import RepoResponse, CommitInfo
+
+# Sync Log schemas
+from app.schemas.sync_log import SyncLogResponse
+
+__all__ = [
+    # Common
+    "SuccessResponse",
+    "ErrorResponse",
+    # SSH Key
+    "SshKeyCreate",
+    "SshKeyResponse",
+    # Server
+    "ServerCreate",
+    "ServerUpdate",
+    "ServerResponse",
+    # Repository
+    "RepoResponse",
+    "CommitInfo",
+    # Sync Log
+    "SyncLogResponse",
+]