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

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

api/services/external_knowledge_service.py

@@ -89,7 +89,7 @@ class ExternalDatasetService:
                 raise ValueError(f"invalid endpoint: {endpoint}")
         try:
             response = httpx.post(endpoint, headers={"Authorization": f"Bearer {api_key}"})
-        except Exception as e:
+        except Exception:
             raise ValueError(f"failed to connect to the endpoint: {endpoint}")
         if response.status_code == 502:
             raise ValueError(f"Bad Gateway: failed to connect to the endpoint: {endpoint}")