Address ENG-10130.
When main compaction is created, we want to update main database with fresh encryption key too to ensure consistency, which is especially important during QR auth.

1. Created backup compaction and confirmed the main DB is rekeyed and still usable.
2. Added a device with QR flow - it was able to restore
3. Logged out and successfully restored the primary device

Made sure it has no effect for UserKeys only backup (usingFullBackup = false)