Add credit request comment to complaint sheet row

Complaint credit request rows hide next steps, forcing billing to search for context. Billing can raise RMAs and resolve credits same day thanks to a clear comment on the master complaint row.

Overview

When credit requests land in an intake sheet, billing wastes time locating the master complaint and raising RMAs. This flow posts a clear, standardized comment on the master row so credit analysts see required actions and can raise RMAs same day.