* Log checked headers for Bite events
* Log checked headers for Drip drip events
* Log checked headers for Drip file events
- mark headers checked for 3 implementations of file on the Drip contract
* Log checked headers for Frob frob events
* Log checked headers for Pit file events
- mark headers checked for 3 implementations of file on the Pit contract
* Log checked headers for Vat init events