We are able to save a webhook response payload field to a custom field for a contact upon success, but when the response is an error, I am not able to save this response to the contact custom field.

This request is to be able to add error response fields as a value on the contact. The use case for this is that we commonly route leads to our lead buyers, but in the case of a duplicate submission, we would like to be able to see the error message that this was a duplicate submission save to the contact rather than only being able to see it in workflow history.