refactor(database): use asyncio

main.py

@@ -1,24 +1,31 @@
 from __future__ import annotations
 
+from contextlib import asynccontextmanager
 from datetime import datetime
 
 from app.config import settings
-from app.dependencies.database import engine
+from app.dependencies.database import create_tables
 from app.router import api_router, auth_router, signalr_router
 
 from fastapi import FastAPI
-from sqlmodel import SQLModel
 
 # 注意: 表结构现在通过 migrations 管理，不再自动创建
 # 如需创建表，请运行: python quick_sync.py
 
-app = FastAPI(title="osu! API 模拟服务器", version="1.0.0")
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    # on startup
+    await create_tables()
+    # on shutdown
+    yield
+
+
+app = FastAPI(title="osu! API 模拟服务器", version="1.0.0", lifespan=lifespan)
 app.include_router(api_router, prefix="/api/v2")
 app.include_router(signalr_router, prefix="/signalr")
 app.include_router(auth_router)
 
-SQLModel.metadata.create_all(bind=engine)
-
 
 @app.get("/")
 async def root():