Hermes shipped background fan-out delegation with no wall-clock bound on a busy worker

What this changes for operators

• v0.17.0 ships background fire-and-forget fan-out delegation (#49734) in the same line of work that removed the default subagent wall-clock timeout (#45149). A heartbeat/inactivity backstop remains for a wedged worker, but the wall-clock bound on a productively-busy runaway worker is gone and not replaced; the only bound on the fan-out is one async-pool slot for the whole batch.
• Operators running long-horizon multi-agent Hermes work should re-introduce a spend or time bound themselves: a busy runaway background worker now has no wall-clock or cost ceiling.