- users module: profile + address CRUD behind use cases (users_profiles,
users_addresses)
- roles customer/admin on identity_users; role resolved from DB per request
- shared auth contract (Authenticate, requireRole, requireOwnerOrAdmin)
injected from composition root; users never imports identity
- authorization runs before existence checks; address SQL scoped by user_id
- @fastify/cookie registered once at app root (cross-module)
- migrations 003_identity_roles + 004_users (reversible)
- no new npm dependencies; tests: unit 52, integration 22
Gates: reviewer/security/qa APPROVED; verify.sh green
