debug(sse): Add detailed logging for download matching

Add debug logging to trace:
- When downloads payload is built
- Data sizes from cache (SAB, qBit, Sonarr, Radarr)
- Number of downloads found and their titles

This will help diagnose why Dora downloads aren't appearing.

server/routes/dashboard.js

@@ -912,6 +912,8 @@ router.get('/stream', requireAuth, async (req, res) => {
         await pollAllServices();
       }
 
+      console.log(`[SSE] Building downloads for ${user.name} (showAll=${showAll})`);
+
       const sabQueueData = cache.get('poll:sab-queue') || { slots: [] };
       const sabHistoryData = cache.get('poll:sab-history') || { slots: [] };
       const sonarrTagsResults = cache.get('poll:sonarr-tags') || [];
@@ -922,6 +924,10 @@ router.get('/stream', requireAuth, async (req, res) => {
       const radarrTagsData = cache.get('poll:radarr-tags') || [];
       const qbittorrentTorrents = cache.get('poll:qbittorrent') || [];
 
+      console.log(`[SSE] Data sizes - SAB queue: ${sabQueueData.slots?.length || 0}, SAB history: ${sabHistoryData.slots?.length || 0}, qBit: ${qbittorrentTorrents.length}`);
+      console.log(`[SSE] Sonarr queue: ${sonarrQueueData.records?.length || 0}, history: ${sonarrHistoryData.records?.length || 0}`);
+      console.log(`[SSE] Radarr queue: ${radarrQueueData.records?.length || 0}, history: ${radarrHistoryData.records?.length || 0}`);
+
       const sabnzbdQueue = { data: { queue: sabQueueData } };
       const sabnzbdHistory = { data: { history: sabHistoryData } };
       const sonarrQueue = { data: sonarrQueueData };
@@ -1127,6 +1133,10 @@ router.get('/stream', requireAuth, async (req, res) => {
       }
 
       // Write SSE event
+      console.log(`[SSE] Sending ${userDownloads.length} downloads for ${user.name}`);
+      if (userDownloads.length > 0) {
+        console.log(`[SSE] Download titles: ${userDownloads.map(d => d.title).join(', ')}`);
+      }
       res.write(`data: ${JSON.stringify({ user: user.name, isAdmin, downloads: userDownloads })}\n\n`);
     } catch (err) {
       console.error('[SSE] Error building payload:', sanitizeError(err));