fix: lint

api/core/tools/signature.py

@@ -5,6 +5,8 @@ import os
 import time
 
 from configs import dify_config
+
+
 def sign_tool_file(tool_file_id: str, extension: str) -> str:
     """
     sign file to get a temporary url for plugin access

api/core/tools/tool_file_manager.py

@@ -19,7 +19,6 @@ from extensions.ext_storage import storage
 from models.model import MessageFile
 from models.tools import ToolFile
 
-
 logger = logging.getLogger(__name__)
 
 from sqlalchemy.engine import Engine