refactor: remove model download and directory creation from FastAPI lifespan

Author: tuke307

tree-disk-api/src/main.py

@@ -3,18 +3,13 @@
 from fastapi.middleware.cors import CORSMiddleware
 import uvicorn
 
-from config.preparation import create_dirs, download_u2net_model, download_yolo_model
 from api.router import router
 
 
 @asynccontextmanager
 async def lifespan(app: FastAPI):
     print("FastAPI app started.")
 
-    create_dirs()
-    download_u2net_model()
-    download_yolo_model()
-
     yield