Alert on postgres_logs 'checkpoint complete' with write= over a few seconds - would have fired BEFORE the 2026-09-04 student-visible 500s

MARS-733 mars Deferred

WP4c: archive twins + triggers for practicaReviews + practicaComentarios + studentPostgradoProgression

MARS-497 mars Deferred ↳ MARS-492

WP4b: archive twins + triggers for supportTickets/Messages/NotifySubscriptions + accessRequests + accountSwitchLinks

MARS-496 mars Deferred ↳ MARS-492

WP4a: archive twins + triggers for userRoles + lookupOptions

MARS-495 mars Deferred ↳ MARS-492

WP2+WP3: add deletedByUserId + createdByUserId coverage columns

MARS-494 mars Deferred ↳ MARS-492

WP1 naming: deletedBy -> deletedByUserId dual-column shim

MARS-493 mars Deferred ↳ MARS-492