When creating a record, queue a job to fetch artist info

lib/music_library/records/record.ex

@@ -34,6 +34,10 @@ defmodule MusicLibrary.Records.Record do
     Enum.map_join(record.artists, ", ", fn artist -> artist.name end)
   end
 
+  def artist_ids(record) do
+    Enum.map(record.artists, fn artist -> artist.musicbrainz_id end)
+  end
+
   def formats, do: @formats
   def types, do: @types