Refactor media asset handling: update ListMediaAssetsQuery to accept an array of statuses, modify MediaEndpoints to handle multiple statuses, and enhance MediaProcessingQueue for improved signal handling. Update frontend components to support new status filtering and improve user experience with asset selection.

frontend/src/features/admin/channels/ChannelDetail.tsx

@@ -54,7 +54,7 @@ export function ChannelDetail({ channelId }: { channelId: string }) {
   const { data: shows } = useQuery({ queryKey: ['admin', 'shows'], queryFn: listShows })
   const { data: ready } = useQuery({
     queryKey: ['admin', 'media', 'ready'],
-    queryFn: () => listMedia({ page: 1, pageSize: 100, status: 'Ready' }),
+    queryFn: () => listMedia({ page: 1, pageSize: 100, statuses: ['Ready'] }),
   })
   const { data: schedule } = useQuery({
     queryKey: ['admin', 'channels', channelId, 'schedule'],