fix(sabnzbd): Handle labels as array or string

SABnzbd API returns labels as an array in newer versions,
but the code assumed it was a comma-separated string.
Now handles both cases to prevent 'slot.labels.split is not a function' error.

server/clients/SABnzbdClient.js

@@ -167,7 +167,7 @@ class SABnzbdClient extends DownloadClient {
       speed: slot.kbpersec ? slot.kbpersec * 1024 : 0, // Convert KB/s to bytes/s
       eta: this.calculateEta(slot.timeleft || slot.eta),
       category: slot.cat || undefined,
-      tags: slot.labels ? slot.labels.split(',').filter(tag => tag.trim()) : [],
+      tags: slot.labels ? (Array.isArray(slot.labels) ? slot.labels : slot.labels.split(',')).filter(tag => tag && tag.trim()) : [],
       savePath: slot.final_name || undefined,
       addedOn: slot.added ? new Date(slot.added * 1000).toISOString() : undefined,
       arrQueueId: arrInfo.queueId,