anti c0ad380020 feat(lifecycle): runner + strategies + bus topic ...

Add decnet.lifecycle package: pure orchestration layer that the
master API will invoke via asyncio.create_task to drive DeckyLifecycle
rows through pending -> running -> succeeded | failed without
holding an HTTP request open.

Strategy classes per (operation, transport):
- LocalDeployStrategy: master-resident, runs engine.deployer.deploy
  in a thread.
- SwarmDeployStrategy: shards by host_uuid, dispatches via
  AgentClient.deploy; worker drives terminal via heartbeat.
- LocalMutateStrategy: write_compose + compose up.
- SwarmMutateStrategy: AgentClient.mutate; worker drives terminal.

decnet.bus.topics gains decky_lifecycle(name) -> decky.<name>.lifecycle
plus DECKY_LIFECYCLE constant. Payload documented in the wiki
(separate commit). publish_safely keeps bus best-effort.

Nothing is wired to call this yet -- next commits convert worker
/deploy /mutate to 202, then heartbeat delta wiring, then master API.

2026-05-22 16:25:33 -04:00

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