Adds refunds of EnakPoint payments (docs/prd-point-coin.md F9, K7, Q13,
PC-307).
After a void or refund, onOrderRefunded now returns EnakPoint before taking
earning back. For each EnakPoint payment of the order it returns everything
on a void, and floor(refunded rupiah / the frozen point_value) when the
payment itself was refunded, so a later change of the point value does not
change how many come back and a remainder below one EnakPoint is lost. It
never returns more than the payment used, and only what has not come back
yet, so repeating is safe. PAYMENT_REFUND rows point at the PAYMENT they
reverse, and the EnakPoint go back into lots with the expiry of the lots
they were taken from, longest-lasting first (the 7-day extension waits on
note N4).
RefundOrder, which hands money back in cash or another method, is now
limited to what was paid with other methods; the EnakPoint part has to be
refunded through its own payment. That answers 400.
Fixes earning reversal from PC-204: a refund of the EnakPoint part raised
orders.refund_amount and so took earning back, although that part never
earned. It is now left out of the refund the reversal uses.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
