The overdue-feedback lists are a live query without stored state, so a
feedback nobody will provide any more could not be written off. The new
disposition.feedback_waived flag takes a placement out of the admin and
manager dashboards, the house-manager list and the reminder mail.
Statistics still count a waived placement as a missing feedback. The
flag has no UI yet and is set by SQL.
Co-Authored-By: Claude Opus 5.5 <[email protected]>