Revision 2 live run passed 24/25; the clean merge hit Forgejo's 405 during
the mergeability recheck. Revision 3 waits for mergeable, retries only 405
(max 3) and records status codes. 7 boundary tests, isolated rehearsal
(27 checks) and the attended live run (26/26, verified, cleanup confirmed)
pass. Revision 2 proposal and receipts retained.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
