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/cleanup_authie_sessions_scheduled_task.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+require "authie/session"
+
+class CleanupAuthieSessionsScheduledTask < ApplicationScheduledTask
+
+  def call
+    Authie::Session.cleanup
+  end
+
+end