feat(mcp) : add CRUD tools for Sites, Constructeurs, Products

- 5 tools each: list, get, create, update, delete
- McpToolHelper extracted to AbstractApiTestCase for reuse
- DashboardStatsToolTest simplified to use base helpers
- 22 MCP tests pass

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/Mcp/Tool/Site/UpdateSiteTool.php

@@ -0,0 +1,71 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Mcp\Tool\Site;
+
+use App\Mcp\Tool\McpToolHelper;
+use App\Repository\SiteRepository;
+use Doctrine\ORM\EntityManagerInterface;
+use Mcp\Capability\Attribute\McpTool;
+use Symfony\Bundle\SecurityBundle\Security;
+
+#[McpTool(
+    name: 'update_site',
+    description: 'Update an existing site. Only provided fields are changed. Requires ROLE_GESTIONNAIRE.',
+)]
+class UpdateSiteTool
+{
+    use McpToolHelper;
+
+    public function __construct(
+        private readonly SiteRepository $sites,
+        private readonly EntityManagerInterface $em,
+        private readonly Security $security,
+    ) {}
+
+    public function __invoke(
+        string $siteId,
+        ?string $name = null,
+        ?string $contactName = null,
+        ?string $contactPhone = null,
+        ?string $contactAddress = null,
+        ?string $contactPostalCode = null,
+        ?string $contactCity = null,
+        ?string $color = null,
+    ): array {
+        $this->requireRole($this->security, 'ROLE_GESTIONNAIRE');
+
+        $site = $this->sites->find($siteId);
+
+        if (!$site) {
+            $this->mcpError('not_found', "Site not found: {$siteId}");
+        }
+
+        if (null !== $name) {
+            $site->setName($name);
+        }
+        if (null !== $contactName) {
+            $site->setContactName($contactName);
+        }
+        if (null !== $contactPhone) {
+            $site->setContactPhone($contactPhone);
+        }
+        if (null !== $contactAddress) {
+            $site->setContactAddress($contactAddress);
+        }
+        if (null !== $contactPostalCode) {
+            $site->setContactPostalCode($contactPostalCode);
+        }
+        if (null !== $contactCity) {
+            $site->setContactCity($contactCity);
+        }
+        if (null !== $color) {
+            $site->setColor($color);
+        }
+
+        $this->em->flush();
+
+        return $this->jsonResponse(['id' => $site->getId(), 'name' => $site->getName()]);
+    }
+}