large refactor, ship a few columns from the user table into user_stats

spec/fabricators/user_fabricator.rb

@@ -1,3 +1,6 @@
+Fabricator(:user_stat) do
+end
+
 Fabricator(:user) do
   name 'Bruce Wayne'
   username { sequence(:username) { |i| "bruce#{i}" } }
@@ -57,4 +60,4 @@ Fabricator(:active_user, from: :user) do
   trust_level TrustLevel.levels[:basic]
   active true
   bio_raw "Don't as me about my dad!"
-end
+end