perf: eliminate full Sonarr Series + Radarr Movies library fetches

The poller was fetching the entire series and movie libraries on every
poll cycle (~9s each). Queue and history records already embed the full
series/movie object via includeSeries/includeMovie params.

Changes:
- Remove 'Sonarr Series' and 'Radarr Movies' timed fetches from poller
- Tag queue/history records with _instanceUrl in the poller instead
- Build seriesMap/moviesMap from embedded objects in dashboard
- Remove poll:sonarr-series and poll:radarr-movies cache keys
- Fix missing axios and config imports in dashboard
- Net result: ~18s saved per poll cycle, ~2 fewer API calls

server/utils/poller.js

@@ -80,14 +80,6 @@ async function pollAllServices() {
           return { instance: inst.id, data: { records: [] } };
         })
       ))),
-      timed('Sonarr Series', () => Promise.all(sonarrInstances.map(inst =>
-        axios.get(`${inst.url}/api/v3/series`, {
-          headers: { 'X-Api-Key': inst.apiKey }
-        }).then(res => ({ instance: inst.id, data: res.data })).catch(err => {
-          console.error(`[Poller] Sonarr ${inst.id} series error:`, err.message);
-          return { instance: inst.id, data: [] };
-        })
-      ))),
       timed('Radarr Queue', () => Promise.all(radarrInstances.map(inst =>
         axios.get(`${inst.url}/api/v3/queue`, {
           headers: { 'X-Api-Key': inst.apiKey },
@@ -106,14 +98,6 @@ async function pollAllServices() {
           return { instance: inst.id, data: { records: [] } };
         })
       ))),
-      timed('Radarr Movies', () => Promise.all(radarrInstances.map(inst =>
-        axios.get(`${inst.url}/api/v3/movie`, {
-          headers: { 'X-Api-Key': inst.apiKey }
-        }).then(res => ({ instance: inst.id, data: res.data })).catch(err => {
-          console.error(`[Poller] Radarr ${inst.id} movies error:`, err.message);
-          return { instance: inst.id, data: [] };
-        })
-      ))),
       timed('Radarr Tags', () => Promise.all(radarrInstances.map(inst =>
         axios.get(`${inst.url}/api/v3/tag`, {
           headers: { 'X-Api-Key': inst.apiKey }
@@ -131,9 +115,9 @@ async function pollAllServices() {
     const [
       { result: sabQueues }, { result: sabHistories },
       { result: sonarrTagsResults }, { result: sonarrQueues },
-      { result: sonarrHistories }, { result: sonarrSeriesResults },
+      { result: sonarrHistories },
       { result: radarrQueues }, { result: radarrHistories },
-      { result: radarrMoviesResults }, { result: radarrTagsResults },
+      { result: radarrTagsResults },
       { result: qbittorrentTorrents }
     ] = results;
 
@@ -164,28 +148,49 @@ async function pollAllServices() {
 
     // Sonarr
     cache.set('poll:sonarr-tags', sonarrTagsResults, cacheTTL);
+    // Tag queue/history records with _instanceUrl so embedded series/movie objects can build links
     cache.set('poll:sonarr-queue', {
-      records: sonarrQueues.flatMap(q => q.data.records || [])
+      records: sonarrQueues.flatMap(q => {
+        const inst = sonarrInstances.find(i => i.id === q.instance);
+        const url = inst ? inst.url : null;
+        return (q.data.records || []).map(r => {
+          if (r.series) r.series._instanceUrl = url;
+          return r;
+        });
+      })
     }, cacheTTL);
     cache.set('poll:sonarr-history', {
-      records: sonarrHistories.flatMap(h => h.data.records || [])
+      records: sonarrHistories.flatMap(h => {
+        const inst = sonarrInstances.find(i => i.id === h.instance);
+        const url = inst ? inst.url : null;
+        return (h.data.records || []).map(r => {
+          if (r.series) r.series._instanceUrl = url;
+          return r;
+        });
+      })
     }, cacheTTL);
-    cache.set('poll:sonarr-series', sonarrSeriesResults.flatMap(s => {
-      const inst = sonarrInstances.find(i => i.id === s.instance);
-      return (s.data || []).map(item => ({ ...item, _instanceUrl: inst ? inst.url : null }));
-    }), cacheTTL);
 
     // Radarr
     cache.set('poll:radarr-queue', {
-      records: radarrQueues.flatMap(q => q.data.records || [])
+      records: radarrQueues.flatMap(q => {
+        const inst = radarrInstances.find(i => i.id === q.instance);
+        const url = inst ? inst.url : null;
+        return (q.data.records || []).map(r => {
+          if (r.movie) r.movie._instanceUrl = url;
+          return r;
+        });
+      })
     }, cacheTTL);
     cache.set('poll:radarr-history', {
-      records: radarrHistories.flatMap(h => h.data.records || [])
+      records: radarrHistories.flatMap(h => {
+        const inst = radarrInstances.find(i => i.id === h.instance);
+        const url = inst ? inst.url : null;
+        return (h.data.records || []).map(r => {
+          if (r.movie) r.movie._instanceUrl = url;
+          return r;
+        });
+      })
     }, cacheTTL);
-    cache.set('poll:radarr-movies', radarrMoviesResults.flatMap(m => {
-      const inst = radarrInstances.find(i => i.id === m.instance);
-      return (m.data || []).map(item => ({ ...item, _instanceUrl: inst ? inst.url : null }));
-    }), cacheTTL);
     cache.set('poll:radarr-tags', radarrTagsResults.flatMap(t => t.data || []), cacheTTL);
 
     // qBittorrent