X-Forwarded-Proto approach didn't work - Ceph dashboard SAML doesn't
read it. Re-enabling native SSL so the dashboard sees https:// URLs
directly. Updated both Istio and Envoy Gateway backends for TLS with
insecureSkipVerify for the self-signed cert.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Dashboard runs with ssl: false behind TLS-terminating proxy, so SAML
library sees http:// URLs and rejects responses expecting https://.
Explicitly set X-Forwarded-Proto: https on both Istio VirtualService
and Envoy Gateway HTTPRoute so the SAML ACS URL matches.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>