Fix web push subscriptions being deleted on rate limit or timeout (#11826)

app/workers/web/push_notification_worker.rb

@@ -11,7 +11,13 @@ class Web::PushNotificationWorker
 
     subscription.push(notification) unless notification.activity.nil?
   rescue Webpush::ResponseError => e
-    subscription.destroy! if (400..499).cover?(e.response.code.to_i)
+    code = e.response.code.to_i
+
+    if (400..499).cover?(code) && ![408, 429].include?(code)
+      subscription.destroy!
+    else
+      raise e
+    end
   rescue ActiveRecord::RecordNotFound
     true
   end