Onboarding provisioning failed at CreateOrgAndInvite with
create org: 400 "You must provide at least one domain" — Keycloak 26
requires every organization to carry at least one domain, and the
payload sent none. Membership is registry-authoritative (model B2), so
we do not use Keycloak email-domain auto-join; a synthetic per-tenant
domain <slug>.tenant.breakpilot.com satisfies the constraint, is unique
(slug is unique in the registry), and never clashes with a real
deliverable mail domain. Discovered live: with the service account now
holding manage-realm the 403 is gone and this is the next real blocker
to onboarding every customer's org on KC 26.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CNdLL9BdsWm7MCyui5ffPD
