🐛 Only allow one transaction creation through payment card processor API per order

[Tirodem]

Following issues with Sum Up on live for one or our pilot
direct exchange for this one for informations

[Tirodem]

Note : beware of order on deposit or multi-payment mean on PoS configuration

[coyotte508]

Clarification:

• When payment is submitted to sumup, notify backend and prevent user from trying again. Maybe change "pending" to "processing" for the payment.

[Tirodem]

As said, otherwise, if we don't expire the order at first failed payment, I'm ok too. Thing we don't want anymore is a be-BOP "expired" order with X "failed" sum up transactions and a "paid" sum up transaction in the end, because the customer spends money and the merchant doesn't know it.