add all controllers logic

app/Http/Controllers/Api/System/HealthController.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Http\Controllers\Api\System;
+
+use App\Http\Controllers\Api\BaseApiController;
+use App\Http\Resources\System\HealthStatusResource;
+use App\Services\System\HealthCheckService;
+use Illuminate\Http\JsonResponse;
+use Symfony\Component\HttpFoundation\Response;
+
+class HealthController extends BaseApiController
+{
+    public function __construct(private HealthCheckService $service)
+    {
+        parent::__construct();
+    }
+
+    public function index(): JsonResponse
+    {
+        $payload = $this->service->check();
+        $status = $payload['ok'] ? Response::HTTP_OK : Response::HTTP_SERVICE_UNAVAILABLE;
+
+        return $this->success([
+            'health' => new HealthStatusResource($payload),
+        ], 'Health check.', $status);
+    }
+}