Backfills consent_given=1 rows into user_consents as data:core before dropping the legacy columns. auth.ts now writes user_consents on signup; POST /consent writes user_consents; admin/user routes cleaned of the old fields. Migration is idempotent — DROP COLUMN is wrapped in try/catch so it no-ops on fresh DBs that never had the columns. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>