add additional fields to asset verification code

[mat-if]

Summary

Adds the additional fields outlined in the spec. There's more renaming to be done, but I didn't want to clobber the git diff too much in one PR.

Testing Plan

Unit tests

Documentation

Does this change require any updates to the Iron Fish Docs (ex. the RPC API Reference)? If yes, link a related documentation pull request for the website.

[ ] Yes

Breaking Change

Is this a breaking change? If yes, add notes below on why this is breaking and label it with breaking-change-rpc or breaking-change-sdk.

[ ] Yes