FEATURE: User fields required for existing users - Part 2 (#27172)

We want to allow admins to make new required fields apply to existing users. In order for this to work we need to have a way to make those users fill up the fields on their next page load. This is very similar to how adding a 2FA requirement post-fact works. Users will be redirected to a page where they can fill up the remaining required fields, and until they do that they won't be able to do anything else.

app/models/user_history.rb

@@ -144,6 +144,8 @@ class UserHistory < ActiveRecord::Base
         create_watched_word_group: 105,
         update_watched_word_group: 106,
         delete_watched_word_group: 107,
+        redirected_to_required_fields: 108,
+        filled_in_required_fields: 109,
       )
   end