fix: strip markdown hard-break backslashes from webhook payloads (#13950)

app/models/concerns/push_data_helper.rb

@@ -10,6 +10,6 @@ module PushDataHelper
   end
 
   def webhook_data
-    Conversations::EventDataPresenter.new(self).push_data
+    Conversations::EventDataPresenter.new(self).webhook_data
   end
 end

app/models/message.rb

@@ -170,6 +170,13 @@ class Message < ApplicationRecord
     data
   end
 
+  def webhook_push_event_data
+    push_event_data.merge(
+      content: Messages::WebhookContentNormalizer.normalize(content),
+      processed_message_content: Messages::WebhookContentNormalizer.normalize(processed_message_content)
+    )
+  end
+
   def webhook_data
     data = {
       account: account.webhook_data,