RealmConfig.origins is again purely an allow-list of sign-in sites
within the realm's domain (unset = rp-id and all subdomains), restoring
the restriction semantics the realm rework had silently turned into an
always-open subtree. Cross-domain ROR origins move to their own
RealmConfig.related_origins field — always additive, capped, validated
to be outside the rp-id domain, and the sole source of the
/.well-known/webauthn document.
Admin API POST/PATCH accept related_origins; misfiled entries are
rejected (cross-domain in origins, in-domain in related_origins).
Admin UI: the realm dialog edits the two lists separately with
end-user-oriented explanations (allowed sign-in sites vs. related
domains + the well-known note); the Realms section intro explains the
multi-domain model, and the table shows sign-in site and related domain
counts.
LeoVasanko
b9e6f4bc27