Noah Payment Method Display Details
data class NoahPaymentMethodDisplayDetails(val type: String, val accountNumber: String? = null, val bankCode: String? = null, val bankAddress: NoahBankAddress? = null, val last4: String? = null, val scheme: String? = null, val identifierType: String? = null, val identifier: String? = null)
Per-method display details (bank/card/identifier shapes flattened by the BFF).