Veteran Pet ladder award for users affected by username changes (#10765)

* feat(usernames): Veteran Pet ladder award for affected users

* feat(content): Vet Pet Bailey etc.

website/server/models/user/hooks.js

@@ -125,6 +125,7 @@ function _setUpNewUser (user) {
   let iterableFlags = user.flags.toObject();
 
   user.items.quests.dustbunnies = 1;
+  user.items.pets['Wolf-Veteran'] = 5; // Thank-you for users joining during username upheaval
   user.purchased.background.violet = true;
   user.preferences.background = 'violet';