Add recent outreach rejections stream

tests/candidate-queue.test.ts

@@ -245,6 +245,21 @@ describe('CandidateQueueRepository', () => {
     expect(reasons).toEqual([{ last_error: 'Cleared manually by operator' }]);
   });
 
+  it('lists the latest 50 rejected candidates by their terminal update time', () => {
+    queue.enqueue([post('older', 'alice'), post('newer', 'bob')], 'image', 1, 1_000);
+    const older = queue.claimForScreening('older-worker', 1_000, 1_001)!;
+    queue.reject(older.postId, 'older-worker', 'No gender tag in title/body', 1_002);
+    const newer = queue.claimForScreening('newer-worker', 1_000, 1_003)!;
+    queue.reject(newer.postId, 'newer-worker', 'Seller signals detected', 1_004);
+    queue.enqueue([post('manual', 'carol')], 'image', 1, 1_005);
+    queue.cancelUnsent('manual', 1_006);
+
+    expect(queue.listRecentRejected()).toEqual([
+      expect.objectContaining({ postId: 'newer', lastError: 'Seller signals detected', updatedAt: 1_004 }),
+      expect.objectContaining({ postId: 'older', lastError: 'No gender tag in title/body', updatedAt: 1_002 }),
+    ]);
+  });
+
   it('edits only prepared unsent messages and clears generated attribution', () => {
     queue.enqueue([post('editable', 'alice', 200), post('waiting', 'bob', 100)], 'image', 1, 1_000);
     const editable = queue.claimForScreening('screen', 1_000, 1_001)!;