chore: fix sla email notifications (#9192)

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/mailers/agent_notifications/conversation_notifications_mailer.rb

@@ -61,10 +61,9 @@ class AgentNotifications::ConversationNotificationsMailer < ApplicationMailer
                   user: @agent,
                   conversation: @conversation,
                   inbox: @conversation.inbox,
-                  message: @message,
-                  sla_policy: @sla_policy
+                  message: @message
                 })
   end
 end
 
-AgentNotifications::ConversationNotificationsMailer.include_mod_with('AgentNotifications::ConversationNotificationsMailer')
+AgentNotifications::ConversationNotificationsMailer.prepend_mod_with('AgentNotifications::ConversationNotificationsMailer')

app/models/application_record.rb

@@ -50,4 +50,4 @@ class ApplicationRecord < ActiveRecord::Base
   end
 end
 
-ApplicationRecord.include_mod_with('Enterprise::ApplicationRecord')
+ApplicationRecord.prepend_mod_with('ApplicationRecord')