refactor(pricing): optimize plan provider retrieval with active filtering

- Replace getAllowedProviders() method with direct database query
  - Add filtering for enabled plan providers and active payment providers
  - Include sort ordering for consistent provider display
  - Improve performance by using direct database access instead of model method

app/Livewire/Dashboard/Pricing.php

@@ -157,7 +157,17 @@ class Pricing extends Component
     {
         $plan = $this->plans->firstWhere('id', $planId);
 
-        return $plan ? $plan->getAllowedProviders() : [];
+        if (! $plan) {
+            return [];
+        }
+
+        return $plan->planProviders()
+            ->enabled()
+            ->join('payment_providers', 'plan_providers.provider', '=', 'payment_providers.name')
+            ->where('payment_providers.is_active', true)
+            ->orderBy('plan_providers.sort_order')
+            ->pluck('plan_providers.provider')
+            ->toArray();
     }
 
     /**