fix: import log at module level for extraction logging

backend/routers/items.py

@@ -12,6 +12,7 @@ from .. import models, schemas, auth
 from ..database import get_db
 from ..services.image_processing import ImageProcessor
 from ..services.image_storage import save_image, get_unique_filename
+from ..logger import log
 
 # [H-02] Rate limiter for extract-label endpoint
 limiter = Limiter(key_func=get_remote_address)