Add batch function to remove artist IDs

lib/music_library/records/batch.ex

@@ -52,6 +52,13 @@ defmodule MusicLibrary.Records.Batch do
     |> Repo.update()
   end
 
+  def remove_artists_ids! do
+    # Shotgun approach: remove the first 4 artists IDs from each record.
+    # This is not a general solution, but it works as a quick fix because the record with the most artists has 3.
+    q = "update records set artists = json_remove(artists, '$[0].id', '$[1].id', '$[2].id', '$[3].id');"
+    Repo.query(q)
+  end
+
   defp run_on_all_records(fun) do
     q = from(r in Record)
     stream = Repo.stream(q, max_rows: 50)