- Hetzner LB: proxy protocol enabled on port 80+443
- Traefik: proxyProtocol.trustedIPs includes LB public IP (46.225.37.135)
- Middleware in docfast-staging + snapapi-staging: allows only 178.115.247.134
- Documented in k3s-infra skill for future projects
- DaemonSet updateStrategy note: helm resets maxUnavailable