Before b5d07d4d, hive-c0re minted a new `hyperhive-<unix-seconds>` token
for an agent on every spawn and rebuild and never revoked one, so every
live agent's forge user carries a pile of write-scoped tokens nothing
holds. Nothing in the tree lists or deletes them.
On each start, swarm-controller now walks the store's hive-agent-*
roster (the one the swarm-agent mint pass walks), and for every agent
whose swarm-agent token that pass would keep, deletes each token named
exactly `hyperhive-<digits>`. It logs the count per agent and a total.
- `core` is refused by name in both the roster filter and the per-user
delete: hive-c0re still names core's live admin token
`hyperhive-<unix-seconds>`.
- An agent whose swarm-agent token is not current is skipped, because
consumers fall back to `<state>/forge-token`, the last hyperhive-*
token, until the swarm token is fetched.
- A failed list or delete is logged and skipped; the sweep does not
retry and never blocks startup. A second start deletes nothing.
Tokens on forge users of agents no longer on the store roster (already
destroyed) are not reached.
Closes#4644
23e0c313b8