Integrate refresh of Last.fm data (both per artist and batch)

lib/music_library/artists/batch.ex

@@ -22,4 +22,10 @@ defmodule MusicLibrary.Artists.Batch do
       Artists.refresh_wikipedia_data_async(artist_info)
     end)
   end
+
+  def refresh_lastfm_data do
+    Batch.run_on_all(from(r in ArtistInfo), "artist_info", fn artist_info ->
+      Artists.fetch_lastfm_data_async(artist_info.id)
+    end)
+  end
 end

lib/music_library/worker/fetch_artist_info.ex

@@ -6,6 +6,8 @@ defmodule MusicLibrary.Worker.FetchArtistInfo do
     with {:ok, _artist_info} <- MusicLibrary.Artists.fetch_artist_info(artist_id),
          {:ok, _artist_info} <- MusicLibrary.Artists.fetch_wikipedia_data(artist_id),
          {:ok, _artist_info} <- MusicLibrary.Artists.fetch_image(artist_id) do
+      # fetch_lastfm_data returns {:ok, _} even on API errors, so it won't block embeddings
+      MusicLibrary.Artists.fetch_lastfm_data(artist_id)
       regenerate_record_embeddings(artist_id)
     end
   end

lib/music_library/worker/fetch_artist_last_fm_data.ex

@@ -1,11 +1,16 @@
 defmodule MusicLibrary.Worker.FetchArtistLastFmData do
-  use Oban.Worker, queue: :default, max_attempts: 3
+  use Oban.Worker, queue: :last_fm, max_attempts: 3
 
   @impl Oban.Worker
   def perform(%Oban.Job{args: %{"id" => artist_id}}) do
-    case MusicLibrary.Artists.fetch_lastfm_data(artist_id) do
-      {:ok, _artist_info} -> :ok
-      error -> error
-    end
+    result =
+      case MusicLibrary.Artists.fetch_lastfm_data(artist_id) do
+        {:ok, _artist_info} -> :ok
+        error -> error
+      end
+
+    Process.sleep(500)
+
+    result
   end
 end