feat(billing): renewals, coupons, VAT numbering, billing cycles and invoice payment tracking

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

app/Repositories/Api/ServiceClient/ServiceClientRepository.php

@@ -2,6 +2,7 @@
 
 namespace App\Repositories\Api\ServiceClient;
 
+use App\Support\ProductBillingCycles;
 use App\Models\Service;
 use App\Repositories\Api\BaseApiRepository;
 
@@ -46,8 +47,13 @@ class ServiceClientRepository extends BaseApiRepository implements ServiceClient
 
     public function getPricing(int $productId, string $billingCycle)
     {
-        $pricing = $this->model->find($productId)
-            ->pricings()
+        $product = $this->model->find($productId);
+
+        if (!ProductBillingCycles::allows($product->product_type, $billingCycle)) {
+            return null;
+        }
+
+        $pricing = $product->pricings()
             ->where('billing_cycle', $billingCycle)
             ->where('is_active', 1)
             ->first();