fix: log expected fetch/transcript/tool-server failures as warnings (#24903)

backend/open_webui/utils/tools.py

@@ -1513,7 +1513,7 @@ async def execute_tool_server(
 
     except Exception as err:
         error = str(err)
-        log.exception(f'API Request Error: {error}')
+        log.warning(f'API Request Error: {error}')
         return ({'error': error}, None)