force rewrited code

backend/app/main.py

@@ -1,3 +1,5 @@
+from contextlib import asynccontextmanager
+
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 
@@ -5,10 +7,19 @@ from src.config import ALLOWED_ORIGINS
 from src.database import init_db
 from src.routers import init, login, status
 
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    """Initialize database on startup."""
+    init_db()
+    yield
+
+
 app = FastAPI(
     title="Archivium Local Backend",
     description="Local archive encryption and authentication system",
     version="0.1.0",
+    lifespan=lifespan,
 )
 
 app.add_middleware(
@@ -23,13 +34,6 @@ app.include_router(init.router)
 app.include_router(login.router)
 app.include_router(status.router)
 
-
-@app.on_event("startup")
-def startup():
-    """Initialize database on startup."""
-    init_db()
-
-
 if __name__ == "__main__":
     import uvicorn
     uvicorn.run(app, host="127.0.0.1", port=8000)