curl --request GET \
  --url https://api.contextual.ai/v1/extract/documents/{document_id} \
  --header 'Authorization: Bearer <token>'

{
  "document_id": "<string>",
  "file_name": "<string>",
  "file_size": 123,
  "page_count": 123,
  "uploaded_at": "<string>",
  "status": "<string>",
  "signed_url": "<string>"
}