add health check

src/Command/VectorHealthCheckCommand.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Command;
+
+use App\Vector\VectorIndexHealthService;
+use Symfony\Component\Console\Attribute\AsCommand;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+#[AsCommand(
+    name: 'mto:agent:vector:health',
+    description: 'Health-Check für NDJSON/FAISS Konsistenz'
+)]
+final class VectorHealthCheckCommand extends Command
+{
+    public function __construct(
+        private VectorIndexHealthService $health
+    ) {
+        parent::__construct();
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $result = $this->health->check();
+
+        $output->writeln(json_encode($result, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES));
+
+        return str_starts_with($result['status'], 'OK')
+            ? Command::SUCCESS
+            : Command::FAILURE;
+    }
+}