- Replace gorilla/csrf with net/http CrossOriginProtection
- Require valkey-password and add TLS options for session store
- End session at /logout and revoke refresh tokens
- Re-derive identity and roles from provider every five minutes
- Process each Stripe webhook event in its own Temporal workflow
- Give each outbox entry its own workflow with Temporal retries
- Guard against stale Stripe events with provider timestamps
- Derive transport security from base-url scheme
