List PIX refund reasons
Returns the PIX refund (devolução) reason catalog from JDPI, as code + description pairs. Fetch it before offering a refund choice to a user, rather than hard-coding a list: the catalog is JD’s, not this plugin’s, and it can change with no release here.
Read-only, unfiltered, unpaginated, and not persisted or cached — every call reaches JDPI, so load it once per session rather than once per refund. It changes nothing.
⚠️ The catalog is JD’s full list, but createRefund accepts only BE08, FR01, MD06 and SL02: a code from this response outside those four is refused with 400 PIX-0061 before the refund is attempted. There are no request-attributable refusals here (there is no request to get wrong); a failure is JDPI’s and is reported as such — 503 PIX-1050 when JDPI is unavailable.

