让免费层限流的报告跟真实限流一致，并给少一块结果的静默失败留下函数名和错误类型。

Co-Authored-By: Grok (agent loop)

scripts/vedastro_python_bridge.py

@@ -426,7 +426,7 @@ def _serialize_runtime_value(value: Any) -> Any:
                 except json.JSONDecodeError:
                     return payload
             return _serialize_runtime_value(payload)
-        except Exception:
+        except Exception:  # noqa: BLE001 - to_json is an optional serializer; failure falls through to __dict__ or str
             pass
     if hasattr(value, "__dict__"):
         return {key: _serialize_runtime_value(item) for key, item in vars(value).items() if not key.startswith("_")}