5 endpoints:
- GET /api/v1/fleet/hosts — list registered hosts
- POST /api/v1/fleet/hosts — register host (name, hostname, apiKey, tags)
- DELETE /api/v1/fleet/hosts/:hostId — deregister
- GET /api/v1/fleet/status — fleet-wide health check (parallel probes)
- POST /api/v1/fleet/deploy — generate multi-host deployment plan
Host state persisted in fleet-hosts.json. API keys stored as SHA-256 hashes.
Status endpoint probes each host's /api/v1/system/health in parallel with 3s timeout.
THIS COMPLETES THE ENTIRE 46-ITEM BACKLOG! 1633 tests pass.
