feat(integration): administrar instancias y asociaciones con permisos

Agrega endpoints para crear, editar y asociar instancias a clientes y tipos de sitio. Valida las credenciales contra el esquema del catalogo y devuelve metadatos sin secretos.

Restringe la administracion al rol admin autenticado y mantiene inmutables los codigos de integracion. Incluye pruebas de API, permisos, prioridad de resolucion, edicion compartida y renovacion de tokens.

app/Domains/Integration/Controllers/ClientIntegrationController.php

@@ -4,8 +4,12 @@ namespace App\Domains\Integration\Controllers;
 
 use App\Domains\Client\Models\Client;
 use App\Domains\Integration\Models\Integration;
+use App\Domains\Integration\Models\IntegrationInstance;
+use App\Domains\Integration\Requests\AssociateIntegrationInstanceRequest;
 use App\Domains\Integration\Requests\StoreClientIntegrationRequest;
+use App\Domains\Integration\Resources\IntegrationAssociationResource;
 use App\Domains\Integration\Services\ClientIntegrationService;
+use App\Domains\Integration\Services\IntegrationAssociationService;
 use App\Http\Controllers\Controller;
 use Illuminate\Http\JsonResponse;
 
@@ -61,4 +65,18 @@ class ClientIntegrationController extends Controller
             ], 400);
         }
     }
+
+    public function associate(AssociateIntegrationInstanceRequest $request, Client $client, string $integrationCode, IntegrationAssociationService $service)
+    {
+        return new IntegrationAssociationResource($service->associate(
+            $client, $integrationCode, IntegrationInstance::findOrFail($request->validated('integration_instance_id')),
+        ));
+    }
+
+    public function destroy(Client $client, string $integrationCode, IntegrationAssociationService $service)
+    {
+        $service->detach($client, $integrationCode);
+
+        return response()->noContent();
+    }
 }