fix(audio): replace stray custom-sequence printf with a debug log (#6752)

The custom-sequence registration loop printed each assigned seqNum to
stdout via a bare printf, spamming the console with context-free numbers
on every launch. Convert it to LUSLOG_DEBUG and include the sequence name
so it is hidden by default yet useful for diagnosing music-pack loading.

soh/src/code/audio_load.c

@@ -1443,7 +1443,7 @@ void AudioLoad_Init(void* heap, size_t heapSize) {
         AudioCollection_AddToCollection(customSeqList[j], seqNum);
 
         sDat->seqNumber = seqNum;
-        printf("%d\n", seqNum);
+        LUSLOG_DEBUG("Registered custom sequence \"%s\" as seqNum %d", customSeqList[j], seqNum);
         sequenceMap[sDat->seqNumber] = strdup(customSeqList[j]);
         seqNum++;
     }