every agent lifecycle verb on the admin socket (rebuild / restart /
restart-all / kill / stop / start) now submits job-queue DAGs and
returns their ids; hivectl polls the new HostRequest::QueueDag and
prints a live node-chain progress line per DAG (fan-out children
included), exiting non-zero on failure — --no-wait opts out. DagView
and the queue wire enums move to hive_sh4re::jobs (wire types live in
the shared crate); the last fused rebuild path (lifecycle::rebuild)
is gone. tracker: #2166
