Read the configuration of the company the key is bound to

The accounting platform books and sends the credit note inside the request, and the answer is the booked credit note, 201. A full credit takes the whole invoice back and is refused once anything was credited (`INVOICE_ALREADY_CREDITED`); a partial credit names lines of the invoice, each by no more than is left on it (`VALIDATION_FAILED` with `AMOUNT_EXCEEDS_BILLED` under the line). Amounts are before VAT. **Sending it again is safe**: the same `external_id` is the same credit note, whatever its body says the second time. Booked, it is answered as it stands, 200, and nothing is booked twice; not booked, that attempt is taken up again under its own date and lines. **A credit note that booked and could not be delivered is a success** whose `send_error` says why. An attempt the platform gave no definite answer to holds every other credit on the invoice back (`CREDIT_ATTEMPT_UNRESOLVED`, 409) until the request that made it is sent again. Metered against the `platform_write` bucket as well as `default`.