fix(responses): don't include parsed_arguments when re-serialising

Author: RobertCraigie

src/openai/_utils/_transform.py

@@ -212,7 +212,7 @@ def _transform_recursive(
         return data
 
     if isinstance(data, pydantic.BaseModel):
-        return model_dump(data, exclude_unset=True, mode="json")
+        return model_dump(data, exclude_unset=True, mode="json", exclude=getattr(data, '__api_exclude__', None))
 
     annotated_type = _get_annotated_type(annotation)
     if annotated_type is None:

src/openai/types/responses/parsed_response.py

@@ -55,6 +55,8 @@ class ParsedResponseOutputMessage(ResponseOutputMessage, GenericModel, Generic[C
 class ParsedResponseFunctionToolCall(ResponseFunctionToolCall):
     parsed_arguments: object = None
 
+    __api_exclude__ = {'parsed_arguments'}
+
 
 ParsedResponseOutputItem: TypeAlias = Annotated[
     Union[