just-mitch

See [the spec](https://docs.aztec.network/protocol-specs/gas-and-fees/kernel-tracking). ```[tasklist] ### Tasks - [ ] https://github.com/AztecProtocol/aztec-packages/issues/4101 - [ ] https://github.com/AztecProtocol/aztec-packages/issues/5400 - [ ] https://github.com/AztecProtocol/aztec-packages/issues/5004 - [ ] https://github.com/AztecProtocol/aztec-packages/issues/4089 - [ ] https://github.com/AztecProtocol/aztec-packages/issues/5006 - [ ] https://github.com/AztecProtocol/aztec-packages/issues/6230...

This issue serves as the parent issue (epic) for all issues pertaining to the work needed to get harden the node (and the protocol circuits it runs) to an acceptable...