Missing answers misleading behavior of enabledWhen in repeatable groups

[ruscoder]

In repeatable group, if one questions depends on another and this answer is missing, it uses value from another repeatable group item

Example:

resourceType: Questionnaire
id: test-repeatable-group-1
status: draft
item:
  - linkId: group
    type: group
    repeats: true
    item:
      - linkId: first
        type: string
        text: first
      - linkId: second
        type: string
        text: second
        enableWhen:
          - question: first
            operator: =
            answerString: ok
      
meta:
  profile:
    - https://emr-core.beda.software/StructureDefinition/fhir-emr-questionnaire
  extension:
    - url: ex:createdAt
      valueInstant: '2025-05-29T15:22:50.345605Z'

1. Add two repeatable group items
2. Fill the first group item (or the second) with ok
3. Observe both group items shows the second
4. It disappears if item exists

[ruscoder]

It's not a regression of 1.x.x, it's old bug. In the current implementation it's impossible to fix, because we don't use Questionnaire structure in findAnswerForQuestion function.
It should be changed to contain questionnaire information.