🐞 Ballot Confirmation Code Hash Chaining

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

the current 1.91 build does noit implement hash chaining for ballots encrypted on the same device.

### Expected Behavior

hash chaining should be an optional feature per the spec.

- // H(B) = H(HE;24,χ1,χ2,...,χmB ,Baux). Confirmation Code 3.4.2

### Steps To Reproduce

_No response_

### Environment

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- OS:
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### Anything else?

_No response_