save_origin_visit_webhook: Make origin_url mandatory
If not provided, .get() would return None, which makes get_save_origin_requests_to_update return every SCN request. There is no reason to want the webhook to do that.
Staging instance, all changes can be removed at any time
If not provided, .get() would return None, which makes get_save_origin_requests_to_update return every SCN request. There is no reason to want the webhook to do that.