docs/AUDIT-2026-05-12.md now contains every audit verbatim
(6488 lines). Last to land was the S3-vs-internal-DB routing audit
covering the storage-backend boundary, presigned-URL round-trip,
magic-byte verification on both paths, migrate-storage coverage,
and orphan-blob risk on transaction failure.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>