refactor: share check script helpers

scripts/lib/check-timing-summary.mjs

@@ -0,0 +1,20 @@
+export function formatMs(durationMs) {
+  if (durationMs < 1000) {
+    return `${Math.round(durationMs)}ms`;
+  }
+  return `${(durationMs / 1000).toFixed(2)}s`;
+}
+
+export function printTimingSummary(label, timings, options = {}) {
+  if (options.skipWhenAllOk && timings.every((timing) => timing.status === 0)) {
+    return;
+  }
+
+  console.error(`\n[${label}] summary`);
+  for (const timing of timings) {
+    const status = timing.status === 0 ? "ok" : `failed:${timing.status}`;
+    console.error(
+      `${formatMs(timing.durationMs).padStart(8)}  ${status.padEnd(9)}  ${timing.name}`,
+    );
+  }
+}