Deprecated — where available, prefer the nested candidate_attributes array on POST/PATCH /v3/scorecards, which writes ratings atomically with the scorecard. This endpoint remains fully supported for existing integrations. Record an interviewer's rating on one focus attribute of one scorecard. Both scorecard_id and job_candidate_attribute_id are required, and the referenced job_candidate_attribute must be a focus attribute on the scorecard's interview kit; submitted scorecards reject new ratings. A row may carry only a note with no candidate_attribute_rating (rating defaults to no_decision).