Ensure extra metadata for vorbiscomment is given as multi-line string instead of an array (AzuraCast#7917)

Author: Vaalyn

backend/src/Media/Metadata/Writer.php

@@ -40,7 +40,12 @@ public function __invoke(WriteMetadata $event): void
         $tagwriter->tagformats = $tagFormats;
 
         $writeTags = $metadata->getKnownTags();
-        $writeTags['text'] = $metadata->getExtraTags();
+
+        // GetID3 requires all tags for vorbiscomment to have string values
+        // so we explicitly need to convert the extra tags into a multiline string
+        $writeTags['text'] = in_array('vorbiscomment', $tagFormats)
+            ? implode(PHP_EOL, $metadata->getExtraTags())
+            : $metadata->getExtraTags();
 
         $artContents = $metadata->getArtwork();
         if (null !== $artContents) {