chore: import upstream snapshot with attribution

api/src/db/query-timing.test.ts

@@ -0,0 +1,24 @@
+import { describe, it, expect, vi } from 'vitest';
+
+import { timeOperation } from './query-timing.js';
+
+describe('timeOperation', () => {
+  it('returns the result and emits success with a numeric duration', async () => {
+    const emit = vi.fn();
+
+    const result = await timeOperation(() => Promise.resolve('ok'), emit);
+
+    expect(result).toBe('ok');
+    expect(emit).toHaveBeenCalledWith('success', expect.any(Number));
+  });
+
+  it('re-throws and emits failure when the operation rejects', async () => {
+    const emit = vi.fn();
+    const boom = new Error('boom');
+
+    await expect(timeOperation(() => Promise.reject(boom), emit)).rejects.toBe(
+      boom
+    );
+    expect(emit).toHaveBeenCalledWith('failure', expect.any(Number));
+  });
+});