No source of truth for the `cancelation_reason` parameter in orders/set_status

[sofigern]

There is no way to get the list of allowed cancelation statuses when using API.
In case of sending request like this:

curl -X 'POST' \
  'https://my.prom.ua/api/v1/orders/set_status' \
  -H 'accept: application/json' \
  -H 'Authorization: Bearer {{token}}' \
  -H 'Content-Type: application/json' \
  -d '{
  "status": "canceled",
  "ids": [
    {{order_id}}
  ],
  "cancellation_reason": "other",
  "cancellation_text": "Повернено відправнику"
}'

The response is:

{
  "error": "Incorrect cancellation_reason value"
}

And I see no endpoint or documentation to get the list of allowed cancelation reasons.