Include withdrawals in `consumed` and fix Utxo pov proofs.

[williamdemeo]

Description

This addresses the first item in issue #467.

Checklist

• [ ] Commit sequence broadly makes sense and commits have useful messages
• [ ] Code is formatted according to CONTRIBUTING.md
• [ ] Self-reviewed the diff

[williamdemeo]

Wrong approach. Closing. (Correct approach in new upcoming branch.)