feat: new background work process

This removes all previous dependencies on RabbitMQ and the need to run separate cron and requeueing processes.

app/scheduled_tasks/send_notifications_scheduled_task.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+class SendNotificationsScheduledTask < ApplicationScheduledTask
+
+  def call
+    Server.send_send_limit_notifications
+  end
+
+  def self.next_run_after
+    1.minute.from_now
+  end
+
+end