Measure SPA Navigation Latency by Route

SELECT
  destination_route,
  release,
  COUNT(*) AS navigations,
  approx_percentile_cont(duration_ms, 0.50) AS p50_ms,
  approx_percentile_cont(duration_ms, 0.95) AS p95_ms,
  100.0 * SUM(CASE WHEN status <> 'success' THEN 1 ELSE 0 END)
    / NULLIF(COUNT(*), 0) AS unsuccessful_pct
FROM frontend_navigation_events
WHERE timestamp_utc >= now() - INTERVAL '7 days'
GROUP BY destination_route, release
HAVING COUNT(*) >= 50
ORDER BY p95_ms DESC;