refactor backend module architecture

app/chain/storage.py

@@ -3,9 +3,9 @@ from typing import Optional, Tuple, List, Dict
 
 from app import schemas
 from app.chain import ChainBase
-from app.core.config import settings
-from app.helper.directory import DirectoryHelper
-from app.log import logger
+from app.platform.config import settings
+from app.services.directory import DirectoryHelper
+from app.platform.log import logger
 
 
 class StorageChain(ChainBase):