Persist comment source monitoring

tests/reddit-api.test.ts

@@ -54,6 +54,20 @@ describe('RedditApiClient', () => {
         params: { limit: 10, depth: 1, sort: 'hot', raw_json: 1 }, headers: {},
       });
     });
+
+    it('can request newest comments for a durable source-post watch', async () => {
+      const get = vi.fn().mockResolvedValue({
+        data: [{ data: { children: [] } }, { data: { children: [] } }],
+      });
+      vi.mocked(axios.create).mockReturnValue({ get } as unknown as AxiosInstance);
+      const client2 = new RedditApiClient(getTestConfig(), logger);
+
+      await client2.getBrowsingComments('scene', 'source', 100, 'new');
+
+      expect(get).toHaveBeenCalledWith('/r/scene/comments/source.json', {
+        params: { limit: 100, depth: 1, sort: 'new', raw_json: 1 }, headers: {},
+      });
+    });
   });
 
   describe('hasImage', () => {