A hive's queue credential and the swarm controller's could subscribe to
every subject in the swarm account, so a hive could read every other
hive's deploy requests and every agent's terminal, state, input and
request replies.
Their grants now carry a subscribe allow-list:
- a hive `hive-<h>`: `$SWARM.knowledge`, `$SWARM.deploy.<h>` and its
reply inbox `_INBOX.client.hive-<h>.>`
- the reader (swarm-controller): `$SWARM.term.*`, `$SWARM.term.*.sub.*`,
`$SWARM.agent-state.*` and its reply inbox
`_INBOX.client.<client-id>.>`
`swarm_queue_client::connect`, which hive-c0re and swarm-controller both
use, now connects with `_INBOX.client.<client-id>` as its inbox prefix,
the same shape agents got for their own credential. In async-nats 0.50
every request reply and every ordered consumer (the hive's wanted-state
watch, the controller's KV key listings) delivers under that prefix, so
the one inbox grant covers them all.
A hive or controller still on a build without the prefix has every
JetStream reply refused once the responder runs this policy, so the
clients need to be rebuilt before, or with, swarm-nats-auth.
Closes#4945
d0c2b85d45