Core-promise legs proven on real data: .fab >=1GiB full circle (byte-identical mandatory,
zero sibling contamination, DB round-trip) + SQ3 immich offsite restore-to-live (functional
from offsite alone). Deferred: P3-BROWSER/P3-DELIVERY/P-TIER2-deep/P4-timing/P-DAY0.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HEPuEwyyGDJdcsXLFsTWJn
