fix: assignee_changed callback not getting triggered during conversation creation (#9334)

The reload method in our callback was refreshing the object and hence the saved_change_to_assignee_id? Method wasn't working in the following callbacks.

This impacted the listeners subscribing to the event `ASSIGNEE_CHANGE`, `TEAM_CHANGE` etc

app/dispatchers/async_dispatcher.rb

@@ -10,14 +10,15 @@ class AsyncDispatcher < BaseDispatcher
 
   def listeners
     [
+      AutomationRuleListener.instance,
       CampaignListener.instance,
       CsatSurveyListener.instance,
       HookListener.instance,
       InstallationWebhookListener.instance,
       NotificationListener.instance,
+      ParticipationListener.instance,
       ReportingEventListener.instance,
-      WebhookListener.instance,
-      AutomationRuleListener.instance
+      WebhookListener.instance
     ]
   end
 end