Fixes to email change cleanup

Author: nygrenh

app/controllers/api/v8/users/recently_changed_user_details_controller.rb

@@ -9,6 +9,7 @@ class RecentlyChangedUserDetailsController < Api::V8::BaseController
         def index
           return respond_forbidden unless current_user.administrator?
           RecentlyChangedUserDetail.deleted.where('created_at < ?', DateTime.now - 1.week).update(email: nil)
+          RecentlyChangedUserDetail.email_changed.where('created_at < ?', DateTime.now - 1.month).delete_all
           render json: { changes: RecentlyChangedUserDetail.all }
         end
       end