[Chore/Refactor] Switch from MyPy to Basedpyright for type checking (#25047)

Signed-off-by: -LAN- <laipz8200@outlook.com>

api/core/rag/retrieval/output_parser/structured_chat.py

@@ -19,5 +19,5 @@ class StructuredChatOutputParser:
                     return ReactAction(response["action"], response.get("action_input", {}), text)
             else:
                 return ReactFinish({"output": text}, text)
-        except Exception as e:
+        except Exception:
             raise ValueError(f"Could not parse LLM output: {text}")