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With validation now passing 133/133, the only remaining job failure was the regression gate flagging 4 timing "regressions". Two compounding causes: 1. Stale baseline: the committed baseline was captured (2026-04-24) under the old, lighter workload — before the new txq-burst phase (60 TPS) existed. The heavier per-ledger work genuinely raises ledger.build / tx.apply / ledger.validate / acceptLedger timings, so every run regressed against it. Refreshed the baseline from the latest CI-measured timings (same workload). 2. Histogram quantization: SpanMetrics latency buckets are [1,5,10,25,...]ms, so a sub-millisecond quantile near a low-end boundary can jump a full bucket (1ms->5ms) between runs with no real change. The old absolute bounds (2-5ms) were narrower than one bucket width, so that jitter tripped the gate. Widened the default span bounds to 10-15ms (~2 low-end buckets) and pct to 50%, and the job_queue running bound to 20ms, to tolerate quantization noise while still catching genuine multi-bucket regressions. The consensus.* overrides (tight pct, large abs) are unchanged. The refreshed baseline also picks up real rpc.ws_message timings (previously null under the phantom rpc.request key). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>