Add retry for failed media downloads and tootctl media refresh (#11775)

app/workers/redownload_media_worker.rb

@@ -0,0 +1,19 @@
+# frozen_string_literal: true
+
+class RedownloadMediaWorker
+  include Sidekiq::Worker
+  include ExponentialBackoff
+
+  sidekiq_options queue: 'pull', retry: 3
+
+  def perform(id)
+    media_attachment = MediaAttachment.find(id)
+
+    return if media_attachment.remote_url.blank?
+
+    media_attachment.reset_file!
+    media_attachment.save
+  rescue ActiveRecord::RecordNotFound
+    true
+  end
+end