PredictionLogger latency p99 (Wave 2.5 §E)

Revisit async-queue work if p99 > 50.0ms over a 7-day window OR any database is locked line in service logs over the same window.

strategy_id samples p50_ms p99_ms max_ms over_threshold window_started_at written_at
p30_pair_direction 10000 1.805 14.590 20.692 ok 2026-04-29T14:26:35.785726+00:00 2026-04-30T21:48:03.087507+00:00
shadow_regime 800 0.896 11.933 12.521 ok 2026-04-29T05:30:29.456796+00:00 2026-04-30T21:00:15.782603+00:00