Add completion comment to moved project cards for owners

Your cards moved into the configured finished list lose ownership context and handoff notes. Coordinators see who closed it same day when a completion comment is added to the card.

Overview

Cards moved to a finished list can lose ownership details and stall downstream steps, creating unnecessary follow-ups and reconciliation delays. This flow writes a completion comment with the actor on the destination card so coordinators see who closed the work, reducing clarification cycles same day.