Polyfill scrobbled tracks every hour

config/config.exs

@@ -82,7 +82,14 @@ config :error_tracker,
 config :music_library, Oban,
   engine: Oban.Engines.Lite,
   queues: [default: 10, heavy_writes: 1, music_brainz: 1],
-  repo: MusicLibrary.BackgroundRepo
+  repo: MusicLibrary.BackgroundRepo,
+  plugins: [
+    {Oban.Plugins.Cron,
+     crontab: [
+       # every hour
+       {"0 * * * *", MusicLibrary.Worker.PolyfillScrobbledTracks}
+     ]}
+  ]
 
 config :music_library, MusicLibrary.ErrorRepo, priv: "priv/error_repo"
 

lib/music_library/worker/polyfill_scrobbled_tracks.ex

@@ -0,0 +1,10 @@
+defmodule MusicLibrary.Worker.PolyfillScrobbledTracks do
+  use Oban.Worker, queue: :heavy_writes, max_attempts: 3
+
+  alias MusicLibrary.ScrobbleActivity.Backfill
+
+  @impl Oban.Worker
+  def perform(%Oban.Job{args: _}) do
+    Backfill.fill_missing_artist_ids()
+  end
+end