chore: bump minimum supported Python version to 3.11 (#10386)

api/core/tools/tool_engine.py

@@ -1,7 +1,7 @@
 import json
 from collections.abc import Mapping
 from copy import deepcopy
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 from mimetypes import guess_type
 from typing import Any, Optional, Union
 
@@ -158,7 +158,7 @@ class ToolEngine:
         """
         Invoke the tool with the given arguments.
         """
-        started_at = datetime.now(timezone.utc)
+        started_at = datetime.now(UTC)
         meta = ToolInvokeMeta(
             time_cost=0.0,
             error=None,
@@ -176,7 +176,7 @@ class ToolEngine:
             meta.error = str(e)
             raise ToolEngineInvokeError(meta)
         finally:
-            ended_at = datetime.now(timezone.utc)
+            ended_at = datetime.now(UTC)
             meta.time_cost = (ended_at - started_at).total_seconds()
 
         return meta, response