Restart now offers the same graceful-vs-hard choice stop already has:
single-agent menu item and the bulk-select action bar both grow a
'restart gracefully' checkbox that routes through the existing
submit::graceful_restart DAG (signal -> drain -> stop -> reconcile)
instead of a hard restart. Backend gains a ?graceful=true query param
on POST /api/restart/<name>, mirroring post_kill's shape (renamed
KillParams -> GracefulParams since it's now shared).
- deploy-window gate (meta::exclusive) + path-limited meta commits:
a perm/lock/topology commit can no longer sweep an ApprovalDeploy's
staged flake.lock and neuter abort_deploy (regression test included)
- cancel surfaces now buffer terminal roll-ups the scheduler drains,
so a queued approval DAG cancelled by the operator resolves its
approval instead of dangling, and cancelled power ops revert their
wanted flip to the observed state
- hivectl restart / restart-all ride the queue (lease serialization,
transient guard) and restart sets wanted=Up like the old kill+start
- exactly one Rebuilt event per rebuild DAG, emitted at terminal
- StopForUpdate pre-seeds a missing agent_power row from the pre-stop
observation so a rebuild can't strand an unknown agent offline
- history trim keeps terminal fan-out parents with live children
- audit_log back on db::open; swarm.js badge for reconcile DAGs
