Prune artist info after deleting the artist's last record

lib/music_library/worker/prune_artist_info.ex

@@ -0,0 +1,18 @@
+defmodule MusicLibrary.Worker.PruneArtistInfo do
+  use Oban.Worker, queue: :default, max_attempts: 3
+
+  @impl Oban.Worker
+  def perform(%Oban.Job{args: %{"id" => artist_id}}) do
+    if MusicLibrary.Artists.exists?(artist_id) do
+      :ok
+    else
+      delete_artist_info(artist_id)
+    end
+  end
+
+  defp delete_artist_info(artist_id) do
+    with {_count, nil} <- MusicLibrary.Artists.delete_artist_info(artist_id) do
+      :ok
+    end
+  end
+end