* ✨ ghost auth: sync email
refs #7452
- sync email changes in background (every hour right now)
- sync logged in user only!
- no sync if auth strategy password is used
- GET /users/me is triggered on every page refresh
- added TODO to support or add long polling for syncing data later
- no tests yet on purpose, as i would like to get a basic review first
* 🐩 use events
- remember sync per user
