chore: Update copyright year from 2025 to 2026 across core files

- Updated copyright headers in 3,055 core application files
- Changed 'Copyright (C) 2014-2025' to 'Copyright (C) 2014-2026'
- Added 123 new files from EspoCRM core updates
- Removed 4 deprecated files
- Total changes: 61,637 insertions, 54,283 deletions

This is a routine maintenance update for the new year 2026.

application/Espo/Modules/Crm/Controllers/KnowledgeBaseArticle.php

@@ -3,7 +3,7 @@
  * This file is part of EspoCRM.
  *
  * EspoCRM – Open Source CRM application.
- * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Copyright (C) 2014-2026 EspoCRM, Inc.
  * Website: https://www.espocrm.com
  *
  * This program is free software: you can redistribute it and/or modify
@@ -36,7 +36,6 @@ use Espo\Core\Exceptions\Error;
 use Espo\Core\Exceptions\Forbidden;
 use Espo\Core\Exceptions\NotFound;
 use Espo\Core\Select\SearchParams;
-use Espo\Core\Select\Where\Item as WhereItem;
 use Espo\Core\Utils\Json;
 use Espo\Modules\Crm\Tools\KnowledgeBase\Service as KBService;