skipAnswers(...) not working with Subject concept type

### Issue:
status.answersToSkip = [uuid] works but skipAnswers(...) doesn't work. showAnswers(...) works with subject concept type.

### Sample rule to try:
```
'use strict';
({params, imports}) => {
const encounter = params.entity;
const formElement = params.formElement;
const statusBuilder = new imports.rulesConfig.FormElementStatusBuilder({encounter, formElement});

// Subject UUID(s) to show; empty list shows all members.
const toSkipMemberUUIDs = ['subject uuid to skip'];
statusBuilder.skipAnswers(...toSkipMemberUUIDs);
return statusBuilder.build();
};
```

Start with FormElementStatusBuilder and compare the skipAnswers(...) behavior with the working showAnswers(...) path for a Subject concept type. Reproduce the sample rule using a subject UUID, then verify that the specified subject answers are skipped in the built status, matching the behavior of status.answersToSkip.

Written by the indexing model from the issue text.