Offer invitations to use retry_on/discard_on for common cases

activejob/lib/rails/generators/job/templates/application_job.rb

 <% module_namespacing do -%>
 class ApplicationJob < ActiveJob::Base
+  # Automatically retry jobs that encountered a deadlock
+  # retry_on ActiveRecord::Deadlocked
+
+  # Most jobs are safe to ignore if the underlying records are no longer available
+  # discard_on ActiveJob::DeserializationError
 end
 <% end -%>