Create Organization

Create an organization in the connected Auth0 tenant.

Requires editor on the members-organizations module instance (derived from the POST method by the parent router gate). The organization is created natively in Auth0 (the source of truth). The tenant's default username/password connection (AUTH0_DEFAULT_DB_CONNECTION) is enabled on the new org so members can sign in (best-effort — org creation still succeeds if connection wiring fails). Because a brand-new Auth0 organization has no members — and organizations exist in FGA only through member tuples — the creating operator is added as its first member in both Auth0 and FGA so the new org is immediately reflected in the authorization store and survives the next sync-members reconciliation.