- Delete header on conflict to prompt data refresh (cascade deletes all
data associated with that block)
- Derive header hash from rpc payload rather than computing it from data
(prevents hash mismatch between blockchain and cache)
* VatHeal Converter
* Add VatHeal repository
* Add VatHeal transformer
* Add VatHeal to continuousLogSync command
* Mark vat_init_checked as true when creating vat init records
* Update urn and v converting
* Return error if Repository.MarkCheckedHeader fails
* Add deleting vat heal from test cleanup method
