[Bug]: CSV export drops custom "Other" text in multiple-choice questions

Bug Description

When exporting submissions to CSV, custom text entered into the "Other" field (allowOther: true) of a multiple-choice question is missing from the exported CSV file. While the data is correctly captured and stored in the database / GraphQL payload under value.other, the CSV serializer only flattens the value.value array of choice IDs and omits the nested other text value.

Steps to Reproduce

1. Create a Multiple Choice question and enable "Allow 'Other' option"
2. Submit a response where both predefined choices and a custom "Other" text are entered
3. Go to Form Submissions and click Export CSV.
4. Inspect the resulting CSV column for this question.

Expected Behavior

Show the submissions in the CSV export (with an "Other" indicator)

Screenshots

No response

HeyForm Installation

self hosted

Version

3.0.1

Desktop OS

Windows

Desktop Browser

No response

Desktop Browser Version

No response

Mobile Device

No response

Mobile OS

No response

Mobile Browser

No response

Mobile Browser Version

No response