fix: Change the message status to failed if the Twilio message delivery status is undelivered (#8097)

app/services/twilio/delivery_status_service.rb

@@ -13,7 +13,7 @@ class Twilio::DeliveryStatusService
   private
 
   def process_statuses
-    @message.status = params[:MessageStatus]
+    @message.status = status
     @message.external_error = external_error if error_occurred?
     @message.save!
   end
@@ -22,6 +22,10 @@ class Twilio::DeliveryStatusService
     %w[sent delivered read failed undelivered].include?(params[:MessageStatus])
   end
 
+  def status
+    params[:MessageStatus] == 'undelivered' ? 'failed' : params[:MessageStatus]
+  end
+
   def external_error
     return nil unless error_occurred?