Download a file uploaded in a Typeform response (file_upload answer)

Documented steps

1. Auth: Authorization: Bearer {token} with responses:read scope — file_url is NOT a public/pre-signed link; unauthenticated fetches fail.
2. Find the answer with "type": "file_url" in the response (Responses API or webhook payload) — it belongs to a field of type file_upload.
3. Do NOT parse or rely on the file_url string's structure — Typeform documents it as subject to change.
4. Fetch the bytes via the dedicated endpoint: GET https://api.typeform.com/forms/{form_id}/responses/{response_id}/fields/{field_id}/files/{filename} -H 'Authorization: Bearer {token}'
5. Add ?inline=true to get Content-Disposition: inline instead of attachment.
6. To fetch every uploaded file for a form at once, use the separate 'Download all files uploaded by respondents for a form' endpoint instead of looping per response.
7. Official docs: https://www.typeform.com/developers/responses/reference/get-a-file-from-a-response/ ; https://www.typeform.com/developers/responses/JSON-response-explanation/