Interviewers are the panel members on actual scheduled interviews — each row pairs one interview with one user (or, for external attendees, one email address). When an interview is scheduled, the stage's default interviewers seed this panel, but the final attendee list can differ once the calendar event is built and edited. Each row carries a response_status reflecting the calendar RSVP and a scorecard_id that is set once a scorecard is submitted for that interviewer. A row with a user_id and an empty scorecard_id has no submitted feedback yet; it is only owed once the interview's status is awaiting_feedback or received. Filter to one parent with parent=interview, parent=user, or parent=scorecard plus ids. For the per-stage default panel, see /v3/default_interviewers instead.