anti d1ca96b2f4 feat(agent): /deploy and /mutate become 202 fire-and-forget ...

The wizard API used to hang because /deckies/deploy ran docker compose
build && up -d synchronously, holding the request thread for minutes.
The worker side of that pipeline now returns 202 Accepted immediately
and runs the deploy in an asyncio.create_task.

On task completion (success or failure) the worker pushes a one-off
heartbeat carrying a lifecycle delta per decky:
  {decky_name, operation, status: succeeded|failed, error?, completed_at}

Master pivots these onto open DeckyLifecycle rows in the heartbeat
handler (next commit).  The scheduled 30s heartbeat tick is the
fallback if the immediate push drops.

- decnet/agent/app.py: /deploy and /mutate return 202; dry_run mutate
  still validates synchronously and returns 200.
- decnet/agent/executor.py: deploy_async + mutate_async wrap the work
  and push the completion delta.
- decnet/agent/heartbeat.py: push_lifecycle_delta() helper builds a
  one-off body and POSTs with the same mTLS context as the loop.
- decnet/swarm/client.py: revert deploy/mutate to control timeout
  (master no longer holds the HTTP request open for compose work).

Worker state.json gains no lifecycle field -- master DeckyLifecycle is
the source of truth; the master sweep handles crashed-mid-deploy
recovery.

2026-05-22 16:31:23 -04:00

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