Guarded REST under /api (auth + productId, like items): POST /fleet/jobs (idempotent
submit), GET /fleet/jobs (by stage/idempotencyKey), GET /fleet/jobs/:id, PATCH
/fleet/jobs/:id (fenced transition), POST /fleet/claim, lease renew/release,
factories/heartbeat, and runs/events streams. Every body validated with the Zod
schemas; fenced/conflict map to 409, missing to 404, invalid to 400. Registers
fleetRoutes in server.ts next to itemRoutes. Routes tested via Fastify inject on
the memory provider (real coordinator).