feat(mcp) : add business tools — search, history, comments, custom fields, documents, model types

- search_inventory: global search across all 6 entity types
- get_entity_history + get_activity_log: audit trail access
- 4 comment tools: list, create, resolve, unresolved count
- 3 custom field tools: list values, upsert, delete
- 2 document tools: list, delete (upload via REST only)
- 6 model type tools: list, get, create, update, delete, sync
- 69 MCP tests pass total

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

src/Mcp/Tool/CustomField/ListCustomFieldValuesTool.php

@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Mcp\Tool\CustomField;
+
+use App\Entity\CustomFieldValue;
+use App\Mcp\Tool\McpToolHelper;
+use Doctrine\ORM\EntityManagerInterface;
+use Mcp\Capability\Attribute\McpTool;
+
+#[McpTool(
+    name: 'list_custom_field_values',
+    description: 'List all custom field values for a given entity (machine, composant, piece or product). Returns each value with its custom field name and type.',
+)]
+class ListCustomFieldValuesTool
+{
+    use McpToolHelper;
+
+    private const ALLOWED_TYPES = ['machine', 'composant', 'piece', 'product'];
+
+    public function __construct(
+        private readonly EntityManagerInterface $em,
+    ) {}
+
+    public function __invoke(string $entityType, string $entityId): array
+    {
+        $entityType = strtolower($entityType);
+
+        if (!in_array($entityType, self::ALLOWED_TYPES, true)) {
+            $this->mcpError('validation', "entityType must be one of: machine, composant, piece, product. Got '{$entityType}'.");
+        }
+
+        $rows = $this->em->createQueryBuilder()
+            ->select(
+                'cfv.id',
+                'cfv.value',
+                'cf.id AS customFieldId',
+                'cf.name AS customFieldName',
+                'cf.type AS customFieldType',
+                'cf.required AS customFieldRequired',
+                'cfv.createdAt',
+                'cfv.updatedAt',
+            )
+            ->from(CustomFieldValue::class, 'cfv')
+            ->join('cfv.customField', 'cf')
+            ->where("IDENTITY(cfv.{$entityType}) = :entityId")
+            ->setParameter('entityId', $entityId)
+            ->orderBy('cf.name', 'ASC')
+            ->getQuery()
+            ->getArrayResult()
+        ;
+
+        return $this->jsonResponse([
+            'entityType' => $entityType,
+            'entityId'   => $entityId,
+            'values'     => $rows,
+            'total'      => count($rows),
+        ]);
+    }
+}