PERF: omit user profile and private message stats in web hook serializer.

Gemfile.lock

@@ -533,4 +533,4 @@ DEPENDENCIES
   webpush
 
 BUNDLED WITH
-   1.17.3
+   2.0.1

app/serializers/web_hook_user_serializer.rb

@@ -3,6 +3,10 @@
 class WebHookUserSerializer < UserSerializer
   attributes :external_id
 
+  def omit_stats
+    true
+  end
+
   # remove staff attributes
   def staff_attributes(*attrs)
   end

spec/serializers/web_hook_user_serializer_spec.rb

@@ -23,7 +23,7 @@ RSpec.describe WebHookUserSerializer do
 
   it 'should only include the required keys' do
     count = serializer.as_json.keys.count
-    difference = count - 45
+    difference = count - 43
 
     expect(difference).to eq(0), lambda {
       message = ""