Stripe: token_currency can now return "usdsui"

What changed

Producer-side tools call this additive. It breaks exhaustive switches, strict parsers and generated client enums.

Affects token_currency on payment_method_details_crypto reachable from 262 operations.

New value: usdsui.

can now return "usdsui"

Who is affected

Code that reads Stripe's payment_method_details_crypto objects, used by 262 Stripe operations.

Before and after

Where	Before	After
payment_method_details_crypto.token_currency	"phantom_cash", "usdc", "usdg", "usdp", "usdt"	"phantom_cash", "usdc", "usdg", "usdp", "usdsui", "usdt"

Code that breaks

switch (response.token_currency) {
  // existing branches …
  // no branch for "usdsui"
  default:
    throw new Error("unexpected token_currency");
}

Based on Stripe’s published API specification. How severity is decided.