fix: clarify deferred post listing logs

tests/monitor.test.ts

@@ -168,7 +168,7 @@ describe('MonitorService', () => {
     await expect(monitor.getUnprocessedPosts()).resolves.toEqual([selected]);
     expect(logger.logs).toContainEqual(expect.objectContaining({
       level: 'info',
-      message: 'r/sub1 listing: 4 fetched; 3 screened; 0 already processed; 1 already messaged; 1 seller signals; 0 missing gender tag; 0 gender not targeted; 1 eligible (selected); 0 outside recent window; 1 not evaluated after outcome',
+      message: 'r/sub1 listing: 4 fetched; 3 screened; 0 already processed; 1 already messaged; 1 seller signals; 0 missing gender tag; 0 gender not targeted; 1 eligible (selected); 0 outside recent window; 1 not evaluated after selected recent candidate',
     }));
   });
 
@@ -321,6 +321,32 @@ describe('MonitorService', () => {
     expect(result[0].id).toBe('t3_old');
   });
 
+  it('labels deferred listing posts as older than the eligible fallback', async () => {
+    const now = Math.floor(Date.now() / 1000);
+    const fallback: RedditPost = {
+      id: 't3_fallback', subreddit: 'sub1', author: 'u_fallback', title: 'Fallback',
+      url: 'http://example.com/fallback.jpg', permalink: '/r/sub1/fallback', thumbnail: '',
+      is_self: false, created_utc: now - 7200, over_18: false, spoiler: false,
+    };
+    const older: RedditPost = { ...fallback, id: 't3_older', author: 'u_older', created_utc: now - 10_800 };
+    const config = getTestConfig({
+      reddit: {
+        subreddits: [{ name: 'sub1', type: 'image' }],
+        prioritizeRecentPosts: true,
+        recentWindowMinutes: 60,
+      },
+    });
+    monitor = new MonitorService(
+      createMockRedditApi([fallback, older]), createMockPostsRepo(), createMockMessagesRepo(), config, logger, 0,
+    );
+
+    await monitor.getUnprocessedPosts();
+
+    expect(logger.logs).toContainEqual(expect.objectContaining({
+      message: expect.stringContaining('1 older than eligible fallback'),
+    }));
+  });
+
   it('returns empty array when no subreddits have valid posts', async () => {
     const redditApi = createMockRedditApi([]);
     const postsRepo = createMockPostsRepo();