WIP: Improve User model performances (#10832)

* wip: define items as mixed objects

* add default owned gear

* mark modified

* more mark modified

* more mark modified

* more mark modified

* more mark modified

* fix common tests

* fix common tests

* update mongoose

* add itemsUtils

* use new util function in hall controller

* add tests for items utils

* update website/server to mark all items as modified

* start updating common code

* update login incentives

* update unlock

* remove changes to package-lock.json

* remove changes to package.json

website/server/controllers/api-v3/auth.js

@@ -204,6 +204,8 @@ api.updateUsername = {
       } else {
         user.items.pets['Wolf-Veteran'] = 5;
       }
+
+      user.markModified('items.pets');
     }
     await user.save();