Guestbook Response DTO Change Username to Name

[ChengShi-1]

What this PR does / why we need it:

"name" was missing in JSON response to get Guestbook Responses
Changed "userName" in guestbook response to "name" to match the parser in API GET /api/guestbooks/{guestbookId}/responses

Which issue(s) this PR closes:

• Closes Include name in guestbook responses api #460

Related Dataverse PRs:

• Depends on #Include name in guestbook responses api dataverse#12492

Special notes for your reviewer:

Suggestions on how to test this:

Is there a release notes or changelog update needed for this change?:

Additional documentation:

[Copilot]

Pull request overview

This PR aligns the TypeScript GuestbookResponse model and related tests with the Dataverse API change that returns name (instead of userName) in guestbook responses from GET /api/guestbooks/{guestbookId}/responses, addressing the missing field noted in issue #460.

Changes:

• Renamed GuestbookResponse.userName → GuestbookResponse.name in the domain model.
• Updated unit test fixtures to use name in mocked guestbook response payloads.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
test/unit/guestbooks/GuestbooksRepository.test.ts	Updates mocked guestbook response data to use name instead of userName.
test/unit/guestbooks/GetGuestbookResponsesByGuestbookId.test.ts	Updates the GuestbookResponse test fixture to use name.
src/guestbooks/domain/models/GuestbookResponse.ts	Renames the response field from userName to name in the public model.

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