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>

tests/Mcp/Tool/HistoryToolsTest.php

@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Mcp\Tool;
+
+use App\Tests\AbstractApiTestCase;
+
+/**
+ * @internal
+ */
+class HistoryToolsTest extends AbstractApiTestCase
+{
+    public function testGetActivityLog(): void
+    {
+        $session = $this->createMcpClient('ROLE_VIEWER');
+
+        $data = $this->callMcpTool($session, 'get_activity_log');
+
+        $this->assertArrayHasKey('_parsed', $data);
+        $this->assertArrayHasKey('items', $data['_parsed']);
+        $this->assertArrayHasKey('total', $data['_parsed']);
+        $this->assertArrayHasKey('page', $data['_parsed']);
+        $this->assertArrayHasKey('limit', $data['_parsed']);
+        $this->assertArrayHasKey('pageCount', $data['_parsed']);
+        $this->assertIsArray($data['_parsed']['items']);
+    }
+
+    public function testGetEntityHistory(): void
+    {
+        $machine = $this->createMachine(name: 'History Machine');
+        $session = $this->createMcpClient('ROLE_VIEWER');
+
+        $data = $this->callMcpTool($session, 'get_entity_history', [
+            'entityType' => 'machine',
+            'entityId'   => $machine->getId(),
+        ]);
+
+        $this->assertArrayHasKey('_parsed', $data);
+        $this->assertArrayHasKey('items', $data['_parsed']);
+        $this->assertArrayHasKey('total', $data['_parsed']);
+        $this->assertIsArray($data['_parsed']['items']);
+    }
+}