feat: implement user data schema and API endpoints

- Add Alembic migration setup with async configuration
- Create 16 user data models (users, decks, cards, replays, etc.)
- Implement comprehensive API endpoints with JWT auth
- Add replay, card collection, group, network, preferences, and activity log routers
- Include API documentation and migration test plan
- Update Dockerfile to run migrations on startup

backend/app/main.py

@@ -24,7 +24,7 @@ from fastapi.middleware.cors import CORSMiddleware
 
 from app.core.settings import get_settings
 from app.core.database import engine, mtg_engine, async_session, mtg_async_session
-from app.routers import auth, users, decks, rooms, games, admin, card_router, interactions, refresh
+from app.routers import auth, users, decks, rooms, games, admin, card_router, interactions, refresh, user_data
 from app.services.mtgjson_manager import MTGJSONManager
 
 
@@ -140,6 +140,7 @@ app.include_router(admin.router, prefix="/admin", tags=["Admin"])
 app.include_router(card_router.router, prefix="/api", tags=["MTG Cards"])
 app.include_router(interactions.router, tags=["Card Interactions"])
 app.include_router(refresh.router)
+app.include_router(user_data.router, prefix="/api/v1/user-data", tags=["User Data"])
 
 
 @app.get("/health", tags=["Health"])