* Use transformer factory for Bite
- introduces separate transformer factory for non-LogNote events
- converter includes `ToEntities` for events defined via ABI
* Updates after rebasing with staging
* Add DB migrations for flog
* Add Vow addresses and constants
* Add err logging to ABI signature getter, test for flog sig
* Add flog transformer
* Add tests+data for flog transformer
* Prepend DB tables and columns with vow_
* Panic on failure to get method sig