The shared `hive` fixture turned `deploy.hive-controller.enable` on for
every eval test. It is now off by default; `hiveWithController` turns it
on, and the fixtures whose claims read the hive tier (hive-c0re, the
queue-agent credential, the hive leaf, `deploy.hive-controller.*`, or an
absence that is only meaningful with a hive present) use it.
glue-nats-auth-bao-identity.nix still read the renamed
`services.hyperhive.enable`, which printed the "Obsolete option" trace
six times per CI run. The term is dropped: the pairing is gated on the
queue and the minted PKI, as its sibling glue-nats-bao-identity.nix is.
ea63b0d150