Accept S3 with adaptations: write-back via the dispatch worker to one
authenticated route, hub status is never execution authority, kept
portable for retirement. 6.4: typed columns for enforced fields plus
typed evidence_refs for the rest.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 5502@bnt-lap001
Assistant-Session: 68b3b02f-5d0f-4e71-8421-796f62e50196
