Open Banking Payments via Stripe

In addition to card and direct debit options, we've extended our Stripe integration to support open banking payments (referred to by Stripe as Pay by Bank), offering lower fees than card payments (on Stripe's standard pricing, this is 0.5% + 20p with a £5 cap per payment, versus 1.5% + 20p for standard cards, and 1% for Direct Debit). This remains disabled by default, and can be enabled in the ]customer portal settings](https://web.jobstaq.co.uk/#/settings/customer_portal?tab=payments) to set a default option, and on an invoice-level for any overrides.