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

{
  "id": "<string>",
  "workspace_id": "<string>",
  "source_type": "<string>",
  "external_id": "<string>",
  "created_at": "<string>",
  "updated_at": "<string>",
  "url": "<string>",
  "title": "<string>",
  "author_name": "<string>",
  "author_email": "<string>",
  "content_text": "<string>"
}