Prioritize growth retries and randomize intake

tests/growth-repository.test.ts

@@ -295,6 +295,33 @@ describe('AccountGrowthRepository', () => {
       expect(repo.claimNext(ACCOUNT, 'worker-1', 60_000, 5_000)?.postId).toBe('a');
     });
 
+    it('claims a due retry before a newer untouched thread', () => {
+      repo.enqueueDiscovered(ACCOUNT, [
+        thread('retry', { created_utc: 1_000 }),
+        thread('newer', { created_utc: 9_000 }),
+      ], 10_000);
+      repo.claimNext(ACCOUNT, 'worker-1', 60_000, 10_000);
+      repo.defer(ACCOUNT, 'newer', 'worker-1', 'Temporary failure', 11_000, 10_000);
+
+      repo.enqueueDiscovered(ACCOUNT, [thread('newest', { created_utc: 12_000 })], 12_000);
+
+      expect(repo.claimNext(ACCOUNT, 'worker-1', 60_000, 12_000)?.postId).toBe('newer');
+    });
+
+    it('reports and clears only pending queue work', () => {
+      repo.enqueueDiscovered(ACCOUNT, [
+        thread('queued', { created_utc: 1_000 }),
+        thread('posted', { created_utc: 2_000 }),
+      ], 1_000);
+      repo.claimNext(ACCOUNT, 'worker-1', 60_000, 1_000);
+      repo.defer(ACCOUNT, 'posted', 'worker-1', 'Temporary failure', 5_000, 1_500);
+
+      expect(repo.hasPendingQueueWork(ACCOUNT)).toBe(true);
+      expect(repo.clearPendingQueue(ACCOUNT)).toBe(2);
+      expect(repo.hasPendingQueueWork(ACCOUNT)).toBe(false);
+      expect(repo.listRecent(ACCOUNT)).toEqual([]);
+    });
+
     it('rejects rather than retries a comment interrupted mid-post', () => {
       repo.enqueueDiscovered(ACCOUNT, [thread('a')], 1_000);
       repo.claimNext(ACCOUNT, 'worker-1', 60_000, 1_000);