Update app.py

app.py

@@ -299,9 +299,9 @@ _app = _FA(
 
 # CORS
 try:
-    from fastapi.middleware.cors import CORSMiddleware as _CM
+    from fastapi.middleware.cors import CORSMiddleware as _CORS
     _app.add_middleware(
-        _CM,
+        _CORS,
         allow_origins=["*"],
         allow_credentials=True,
         allow_methods=["*"],
@@ -626,4 +626,4 @@ if __name__ == "__main__":
     except ImportError:
         _lg.error("uvicorn not installed. Install with: pip install uvicorn")
     except Exception as _e:
-        _lg.error(f"Failed to start server: {_e}")
+        _lg.error(f"Failed to start server: {_e}")