queue_policy.yaml (which gates only the cross-thread
worker queue, not the inflight buffer), including workers pool size,
max_depth backpressure, per-job recursion limits, recovery of orphaned jobs
after a crash, and result TTL. The worker queue is off by default; researcher
ships with it enabled as the reference opt-in.
This page is in progress. The shipped
researcher/queue_policy.yaml is fully
commented and is the best reference until it lands.queue_policy.yaml resolves.