Return all downloads per album grouped by quality, filter out failed/cancelled from listings

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/claude-agent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

test/component/monitor_album_test.go

@@ -261,8 +261,8 @@ func TestMonitorAlbum_AlreadyOwned(t *testing.T) {
 	require.NoError(t, err)
 	require.NotNil(t, resp.Album)
 	assert.Equal(t, pb.MonitorState_MONITOR_STATE_MONITORED, resp.Album.MonitorState)
-	require.NotNil(t, resp.Album.Download)
-	assert.Equal(t, "completed", resp.Album.Download.State)
+	require.NotEmpty(t, resp.Album.Downloads)
+	assert.Equal(t, "completed", resp.Album.Downloads[0].State)
 	assert.Nil(t, resp.Release)
 	assert.False(t, indexerCalled)