Pace candidate funnel to send capacity

tests/candidate-queue.test.ts

@@ -77,10 +77,23 @@ describe('CandidateQueueRepository', () => {
       duplicateAuthor: 1,
       previouslyProcessed: 0,
       previouslyContacted: 0,
+      deferredAtCapacity: 0,
     });
     expect(queue.getStats().byStatus.discovered).toBe(2);
   });
 
+  it('fills only the requested intake deficit and reports untouched posts', () => {
+    const result = queue.enqueue([
+      post('p1', 'alice'),
+      post('p2', 'bob'),
+      post('p3', 'carol'),
+    ], 'image', 1, 1_000, 2);
+
+    expect(result.discovered).toBe(2);
+    expect(result.deferredAtCapacity).toBe(1);
+    expect(queue.countActive()).toBe(2);
+  });
+
   it('excludes posts and recipients already handled anywhere', () => {
     db.prepare(`
       INSERT INTO processed_posts (account_id, id, subreddit, author, title, processed_at)