Add certifai-langfuse OIDC client to Keycloak realm export and configure
the Langfuse Docker service with Keycloak SSO env vars (shared realm,
account linking, local auth disabled). Replace the iframe-based analytics
page with an informational landing since cross-origin SSO breaks in
iframes. Users open Langfuse in a new tab where the active Keycloak
session authenticates them transparently.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
