Auto-running migrations on every server boot is dangerous — a broken
migration silently corrupts data or blocks server start. Now require
explicit `npm run migrate && npm run seed:permissions` before start.
Boot asserts schema exists (users + role_permissions tables) and
fails fast with a clear message otherwise.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Maxim Dolgolyov