jcoffey-dev
5a845f06ee
RevokeMembership refuses to revoke a tenant's current Owner (would leave tenants.owner_user_id dangling), but there was no way to actually hand ownership to someone else -- only the raw SetOwner primitive, which -grant-membership-role=owner used without downgrading whoever held Owner before, leaving tenant_memberships claiming two owners while owner_user_id can only name one. Named as a real, disclosed gap in docs/phase-4-runbook.md's "Known gaps". rbacstore.TransferOwner closes it: downgrades the current owner's membership to admin, promotes the new owner, and updates tenants.owner_user_id, all in one pgx transaction -- this package's first use of one. Every other mutation here is a single independent statement because nothing else needs more than one row to agree; this does, for the same reason RevokeMembership's doc comment already gives for refusing to revoke Owner in the first place. -grant-membership-role=owner now refuses when a *different* owner already exists, pointing at the new -transfer-owner-tenant/ -transfer-owner-user-email flags instead of silently producing the inconsistent state -- it remains correct, unchanged, for a tenant's first owner assignment. Verified with the same skip-gated live-Postgres discipline as the rest of this package (TestTransferOwnerMovesOwnershipAndDowngradesPrevious Owner proves the downgrade is real by then successfully revoking the former owner's now-non-Owner membership; two refusal-path tests cover no-current-owner and transfer-to-self) -- not run against a live database in this environment, same disclosed gap as everything else here.