Two requeue-audit tests in api_admin_crawler ordered by created_at, but the admin_audit table's timestamp column is 'at' (migration 0019), so the queries failed at runtime with 42703 (column does not exist). This was the last pre-0.81 test breakage gating deploy; full suite now green locally (cargo test --no-fail-fast). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>