- users router: accept username or id in get/update/delete/worklogs via _find_user_by_id_or_username()
- auth router: add GET /auth/me/permissions for CLI help introspection (token → user → role → permissions)
- add users.role_id for one global role per account
- seed protected account-manager role with account.create permission
- default new accounts to guest role
- block admin role assignment through user management
- allow account-manager permission to create accounts
- require admin auth for user CRUD
- support editable email/full name/password/admin/active fields
- prevent self lockout and self deletion
- return clear error when related records block deletion
