oauth2-proxy + Grafana OIDC discovery to keycloak.home.keithjackson.dev failed x509 'unknown authority' — the wildcard was LE-staging (untrusted). Prod issuer is registered + Ready; switching ACME_CLUSTER_ISSUER dev override staging->prod re-issues a publicly trusted cert. Needed for functional SSO (R-IDP) + R-TLS-01/03 'trusted'. NOTE: the trusted-tls conformance test embeds the LE-staging root and must be updated to the LE production root (ISRG Root X1) / system trust — follow-up. Co-Authored-By: Claude Opus 4.8 <[email protected]>