SESSIONS: Darkwing 18:54:54Z and its 18:56:04Z correction, Dewey
19:00:29Z, Sage's landing line. The schema window plan records row 121
landed 2c16d6b93, a rehearsal of the migration on a copy of the backup
(row 121 gate condition 4), and a role_claims check for an open assistant
claim. P19 task 311 holds row 121's follow-ups (sage-0369).
Co-Authored-By: Claude Opus 5.5 <[email protected]>