TemplateSeeder (OnModuleInit) seeds repo file defaults as global (scopeId NULL)
templates if absent. Idempotent per (key,channel,locale,version): re-boot inserts
nothing; a bumped version adds a new row and keeps the old for audit. Seeds:
welcome (email), payment.receipt (email+sms), onboarding.reminder (email) —
placeholder copy for marketing to replace. 3 tests.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
