debug(sse): Add SAB matching stats to trace filtering

Shows how many SAB items were checked vs how many matched to Sonarr/Radarr.
This will help diagnose why only ~10 of 60 SAB items are appearing.

server/routes/dashboard.js

@@ -1003,10 +1003,13 @@ router.get('/stream', requireAuth, async (req, res) => {
       }
 
       // SABnzbd queue
+      let sabSlotsChecked = 0;
+      let sabSlotsMatched = 0;
       if (sabnzbdQueue.data.queue && sabnzbdQueue.data.queue.slots) {
         for (const slot of sabnzbdQueue.data.queue.slots) {
           const nzbName = slot.filename || slot.nzbname;
           if (!nzbName) continue;
+          sabSlotsChecked++;
           const slotState = getSlotStatusAndSpeed(slot);
           const nzbNameLower = nzbName.toLowerCase();
 
@@ -1015,6 +1018,7 @@ router.get('/stream', requireAuth, async (req, res) => {
             return rTitle && (rTitle.includes(nzbNameLower) || nzbNameLower.includes(rTitle));
           });
           if (sonarrMatch && sonarrMatch.seriesId) {
+            sabSlotsMatched++;
             const series = seriesMap.get(sonarrMatch.seriesId) || sonarrMatch.series;
             if (series) {
               const allTags = extractAllTags(series.tags, sonarrTagMap);
@@ -1167,6 +1171,7 @@ router.get('/stream', requireAuth, async (req, res) => {
       }
 
       // Write SSE event
+      console.log(`[SSE] SAB matching: ${sabSlotsChecked} checked, ${sabSlotsMatched} matched to Sonarr/Radarr`);
       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(', ')}`);