T3025

Depends on D13397

The most recently processed blockheight is not the same as the blockheight of the most recently processed alias. This was introducing count discrepancies.

Add most recently processed blockheight to server state. We will need it to be available in the API later.

delete ecashAliases db
node index.js
populates db
send a non-alias tx to the alias reg address
when it confirms, confirm serverstate processedBlockheight also bumped
send an alias tx
when it confirms, confirm processed correctly and serverState also updates correctly