Add Banxa Klarna Checkout payment type mapping

Unblocks Banxa query progress stuck since Jul 24 on unrecognized
KLARNA Checkout payment methods.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: paullinator

src/partners/banxa.ts

@@ -616,6 +616,8 @@ function getFiatPaymentType(tx: BanxaTx): FiatPaymentType {
       return 'googlepay'
     case 'iDEAL Transfer':
       return 'ideal'
+    case 'KLARNA Checkout':
+      return 'klarna'
     case 'ZeroHash ACH Sell':
     case 'Fortress/Plaid ACH':
       return 'ach'

src/types.ts

@@ -93,6 +93,7 @@ const asFiatPaymentType = asValue(
   'interac',
   'iobank',
   'israelibank',
+  'klarna',
   'mexicobank',
   'mobikwik',
   'moonpay',