add preserve submitters order option

app/jobs/send_submitter_invitation_email_job.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+class SendSubmitterInvitationEmailJob < ApplicationJob
+  def perform(submitter)
+    SubmitterMailer.invitation_email(submitter).deliver_now!
+
+    submitter.sent_at ||= Time.current
+    submitter.save
+  end
+end