Item.definition is not returned on QR items from getResponse()

[taylorkle]

Describe the bug
A clear and concise description of what the bug is.

The getResponse() function does not preserve the item.definition property on Q/QR.

To Reproduce
Steps to reproduce the behavior.

1. build form with questionnaire and corresponding questionnaire response. All items include item.definition.
2. Call getResponse()

Implementation: https://github.com/reason-healthcare/reason-framework/blob/d5a072b4a8360e74975777e4271cfa64e8ef1cfe/packages/cpg-review/src/app/components/apply-form/QuestionnaireRenderer.tsx#L50-L101

Inputs to useBuildForm
Questionnaire:

{
  "resourceType": "Questionnaire",
  "id": "BreastCancerPathway",
  "extension": [
    {
      "url": "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-launchContext",
      "extension": [
        {
          "url": "name",
          "valueCoding": {
            "system": "http://hl7.org/fhir/uv/sdc/CodeSystem/launchContext",
            "code": "patient",
            "display": "Patient"
          }
        },
        {
          "url": "type",
          "valueCode": "Patient"
        }
      ]
    }
  ],
  "url": "http://example.org/cancer-guideline/fhir/Questionnaire/BreastCancerPathway",
  "version": "0.1.0-Patient1-2026-01-15-09.47.43",
  "status": "active",
  "item": [
    {
      "linkId": "1",
      "definition": "http://example.org/cancer-guideline/fhir/StructureDefinition/IsTNBCFeature",
      "text": "IsTNBCFeature",
      "type": "group",
      "required": false,
      "repeats": false,
      "item": [
        {
          "linkId": "1.1",
          "definition": "http://example.org/cancer-guideline/fhir/StructureDefinition/IsTNBCFeature#Observation.value[x]",
          "text": "Has triple negative breast cancer",
          "type": "boolean",
          "required": false,
          "repeats": false
        }
      ]
    },
    {
      "linkId": "2",
      "definition": "http://example.org/cancer-guideline/fhir/StructureDefinition/IsT1cFeature",
      "text": "IsT1cFeature",
      "type": "group",
      "required": false,
      "repeats": false,
      "item": [
        {
          "linkId": "2.1",
          "definition": "http://example.org/cancer-guideline/fhir/StructureDefinition/IsT1cFeature#Observation.value[x]",
          "text": "Tumor size is at least T1c",
          "type": "boolean",
          "required": false,
          "repeats": false
        }
      ]
    }
  ]
}

QuestionnaireResponse:

{
  "resourceType": "QuestionnaireResponse",
  "id": "BreastCancerPathway-Patient1",
  "questionnaire": "http://example.org/cancer-guideline/fhir/Questionnaire/BreastCancerPathway|0.1.0-Patient1-2026-01-15-09.47.43",
  "status": "in-progress",
  "subject": {
    "reference": "Patient/Patient1"
  },
  "authored": "2026-01-15T21:47:44+00:00",
  "item": [
    {
      "linkId": "1",
      "definition": "http://example.org/cancer-guideline/fhir/StructureDefinition/IsTNBCFeature",
      "text": "IsTNBCFeature",
      "item": [
        {
          "linkId": "1.1",
          "definition": "http://example.org/cancer-guideline/fhir/StructureDefinition/IsTNBCFeature#Observation.value[x]",
          "text": "Has triple negative breast cancer"
        }
      ]
    },
    {
      "linkId": "2",
      "definition": "http://example.org/cancer-guideline/fhir/StructureDefinition/IsT1cFeature",
      "text": "IsT1cFeature",
      "item": [
        {
          "extension": [
            {
              "url": "http://hl7.org/fhir/StructureDefinition/questionnaireresponse-author",
              "valueReference": {
                "reference": "http://cqframework.org/fhir/Device/clinical-quality-language"
              }
            }
          ],
          "linkId": "2.1",
          "definition": "http://example.org/cancer-guideline/fhir/StructureDefinition/IsT1cFeature#Observation.value[x]",
          "text": "Tumor size is at least T1c",
          "answer": [
            {
              "valueBoolean": true
            }
          ]
        }
      ]
    }
  ]
}

Output from getResponse()

{
  "resourceType": "QuestionnaireResponse",
  "id": "BreastCancerPathway-Patient1",
  "questionnaire": "http://example.org/cancer-guideline/fhir/Questionnaire/BreastCancerPathway|0.1.0-Patient1-2026-01-15-09.59.31",
  "status": "in-progress",
  "subject": {
    "reference": "Patient/Patient1"
  },
  "authored": "2026-01-15T21:59:31+00:00",
  "item": [
    {
      "linkId": "1",
      "text": "IsTNBCFeature",
      "item": [
        {
          "linkId": "1.1",
          "text": "Has triple negative breast cancer",
          "answer": [
            {
              "valueBoolean": true
            }
          ]
        }
      ]
    },
    {
      "linkId": "2",
      "text": "IsT1cFeature",
      "item": [
        {
          "linkId": "2.1",
          "text": "Tumor size is at least T1c",
          "answer": [
            {
              "valueBoolean": true
            }
          ]
        }
      ]
    }
  ]
}

Expected behavior
A clear and concise description of what you expected to happen.

I expect item.definition to carry across questionnaire/questionnaire response when getting the response from the form.

I believe the issue stems from the return in removeRepeatId where only properties linkId, text, answer, and child items are returned.

  return {
    linkId: qItem.linkId,
    ...(qItem.text && { text: qItem.text }),
    ...(childQrItems.length > 0 && { item: childQrItems }),
    ...(updatedAnswers.length > 0 && { answer: updatedAnswers })
  };