Version 6.3.0

Added

• Add typed response support for Online Payments v3.1 under the new Paymentorder\V3 namespace
• Add Client::setApiVersion() and getApiVersion(); when an API version is set, the Content-Type header becomes application/json;version=<version> (default behaviour unchanged)
• Add v3.1 request classes Paymentorder\V3\Request\{Purchase, Verify, UnscheduledPurchase, UpdateOrder, GetPaymentorder, TransactionCapture, TransactionCancel, TransactionReversal}
• Add top-level v3.1 response DTO Paymentorder\V3\Resource\PaymentOrder (factory-resolved from the paymentOrder JSON key)
• Add post-purchase response wrapper Paymentorder\V3\Resource\Response\PaymentorderResponse with getPaymentOrder(), getOperations(), and a getLatestFinancialTransaction() convenience helper
• Add typed Paid resource (with Details sub-object) and FinancialTransactions resource (with FinancialTransaction items in a FinancialTransactionsListCollection)
• Add link-only sub-resource DTOs: OrderItems, Urls, PayeeInfo, Payer, History, Failed, Aborted, Cancelled, Reversed, FailedAttempts, PostPurchaseFailedAttempts, Metadata, all sharing LinkResourceTrait
• Add Paymentorder\V3\Resource\Response\CallbackPayload for typed parsing of v3.1 webhook bodies
• Add the field countryCode to the class SwedbankPay\Api\Service\Paymentorder\Resource\PaymentorderPayer with methods PaymentorderPayer::setCountryCode() and ::getCountryCode() to allow passing the customer's country code to the API.

Fixed

• ResourceFactory::findFileByNamespace() now resolves resource classes via the active autoloader (class_exists) instead of a path-based file_exists check, fixing resolution when the SDK is consumed through tooling that prefixes namespaces (e.g. PHP-Scoper) without rewriting the on-disk directory layout
• Fix an issue where SwedbankPay\Api\Service\Paymentorder\Resource\PaymentorderPayer::getLastName() was incorrectly returning the first name.