feat: authentication with local accounts, sessions, CSRF, RBAC, and OIDC PKCE (phase 3)
- argon2id (t=3, m=64MiB, p=2) PHC hashing honoring embedded params
- token-bucket rate limiting (10/15min per IP+email) on login/register
- opaque 32B session tokens in Mongo, 30-day sliding expiry, logout-all
- CSRF double-submit cookie/header on authenticated mutations
- bootstrap admin from env with forced first-login password change
- requireAuth/requireRole middleware with disabled-account enforcement
- OIDC code flow with PKCE: lazy discovery, account linking only on
verified email, auto-created developer accounts
- unit tests (RBAC matrix, CSRF, password, rate limiter) + integration
suite covering the full auth matrix incl. an in-test fake IdP
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
etalon
c1cc781279