A grant is a real control-plane users row with auth_source hq, not a
federation shim: the instance authenticates it with no runtime dependency
on admin. CountOtherOwners counts control-plane owners so a locally-created
owner satisfies the last-owner rule too.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Admin's second and final write path into the control plane. It creates
instances and users and nothing else; inject still owns exactly three
licence fields and is untouched.
The owner's password hash is copied from the HQ account, not shared. The
two diverge on the next password change, which is accepted: propagating a
hash across two databases is worse than two passwords that started equal.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
mrhid6andClaude Opus 5