Ticking the installation/training/go_live onboarding milestone steps now
advances the coarse client_module.status (installed/trained/live), audited
in the same transaction. A STATUS_RANK guard blocks downgrades from
unticking or ticking an earlier step after a later one already landed.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Thomas Joise