The platform (185.247.187.147) terminates TLS externally before nginx.
HTTP-01 ACME challenge was stuck for 8 days because the platform
globally redirects HTTP→HTTPS before reaching nginx ingress.
Changes:
- Remove cert-manager.io/cluster-issuer: letsencrypt-prod annotation
- Remove tls section (iot-kube5s-ru-tls secret was never created)
- Set ssl-redirect: false (TLS termination is at the edge, not nginx)
- Update comment to document the actual TLS architecture