Idempotent migrateOnboardingTemplates(db): for every client_module whose module
has a per-module onboarding template (task 2), rebuilds its milestone rows from
that template, carrying mapped ticks (installed->installation, go_live->go_live,
advance_paid->advance_payment, balance_paid->balance_payment, setup_done->
setup_configuration when present) with done_on and payment_id intact. Unmapped
ticks (amc_start, or setup_done where the new template has no matching step) are
dropped and counted. Audited per project; a second run is a no-op via an
identical-key-set short-circuit. Adds the CLI wrapper (mirrors
apply-name-fixes.ts's open-DB idiom, Postgres or SQLite) for the real one-time
run against production data.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Thomas Joise