feat: add client method to BaseIntegrationService for pre-configured HTTP client and implement test for client functionality

app/Domains/Integration/Services/BaseIntegrationService.php

@@ -4,6 +4,8 @@ namespace App\Domains\Integration\Services;
 
 use App\Domains\Integration\Models\Integration;
 use App\Domains\Integration\Models\TenantIntegration;
+use Illuminate\Support\Facades\Http;
+use Illuminate\Http\Client\PendingRequest;
 use Exception;
 
 abstract class BaseIntegrationService
@@ -132,6 +134,18 @@ abstract class BaseIntegrationService
         return $this->tenantIntegration->integration_data[$key] ?? $default;
     }
 
+    /**
+     * Get a pre-configured HTTP client builder.
+     *
+     * @return PendingRequest
+     * @throws Exception
+     */
+    public function client(): PendingRequest
+    {
+        return Http::baseUrl($this->getUrl())
+            ->withHeaders($this->getHeaders());
+    }
+
     /**
      * Get the headers for the integration.
      *