- Deleted subscription invoice-related methods and cache configurations from WhmcsCacheService and WhmcsInvoiceService.
- Updated BillingController to utilize WhmcsPaymentService and WhmcsSsoService directly, removing the BillingOrchestrator.
- Simplified SubscriptionDetail and InvoicesList components by eliminating unnecessary invoice loading logic.
- Adjusted API queries and hooks to streamline invoice data fetching, enhancing performance and maintainability.