Operator chose (session 0072) to add the collection grain beneath today's
project: projects table stays the group tier (keeps content_repo), a new
collections table holds the per-corpus fields, entries re-key to
(collection_id, slug), one default collection per project on migrate, breaking
/p/<project>/e/<slug> -> /p/<project>/c/<collection>/e/<slug> with 308s.
Re-sloted slices N1-N6. Correction banners updated from pending -> decided.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Ben Stull
87279fc545