Migration plan - Asset scale 2 to asset scale 9

[sanducb]

Rafiki:

• [ ] Migrate wallet addresses from asset scale 2 to asset scale 9 in current production database
• [ ] Accounting related tables should also be migrated to asset scale 9
• [ ] Optional: Migrate everything to Tigerbeetle (if we want this, then this should be done first)

Wallet backend:

• [ ] All accounts should have a virtual balance

Changes required by #1357