fix: match 'completed' download state and prefer format over quality

The API returns download.state='completed' but convert_album only
matched 'downloaded', causing monitored+downloaded albums to display
as Wanted with 0 tracks. Also prefer download.format ('FLAC') over
download.quality (empty) for the quality display.

src/proto/music_agregator.v1.rs

@@ -16,6 +16,10 @@ pub struct IndexerOptions {
 #[derive(Clone, PartialEq, ::prost::Message)]
 pub struct MonitorAlbumResponse {
     #[prost(message, optional, tag = "1")]
+    pub album: ::core::option::Option<AlbumDetail>,
+    #[prost(message, optional, tag = "2")]
+    pub artist: ::core::option::Option<ArtistSummary>,
+    #[prost(message, optional, tag = "3")]
     pub release: ::core::option::Option<MonitoredRelease>,
 }
 #[derive(Clone, Copy, PartialEq, ::prost::Message)]