- 6 unit tests exercising the pure drift-classification wiring in Route53SyncService
- Confirms whole-recordset before/after payloads, not per-field deltas
- Confirms CRUD-originated changes still get tagged sync_detected_drift (sync cannot distinguish actor)
- Full suite green aside from 2 pre-existing itglue-search.test.ts failures logged in deferred-items.md (unrelated to this plan)