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.

data/.backup/upgrades/6984c60172a117840/files/application/Espo/Entities/EmailTemplate.php

@@ -0,0 +1,73 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM – Open Source CRM application.
+ * Copyright (C) 2014-2025 EspoCRM, Inc.
+ * Website: https://www.espocrm.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU Affero General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Entities;
+
+use Espo\Core\ORM\Entity;
+use Espo\ORM\EntityCollection;
+
+class EmailTemplate extends Entity
+{
+    public const ENTITY_TYPE = 'EmailTemplate';
+
+    public const STATUS_ACTIVE = 'Active';
+
+    public function getSubject(): ?string
+    {
+        return $this->get('subject');
+    }
+
+    public function getBody(): ?string
+    {
+        return $this->get('body');
+    }
+
+    public function isHtml(): bool
+    {
+        return (bool) $this->get('isHtml');
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getAttachmentIdList(): array
+    {
+        /** @var string[] */
+        return $this->getLinkMultipleIdList('attachments');
+    }
+
+    /**
+     * @return EntityCollection<Attachment>
+     */
+    public function getAttachments(): EntityCollection
+    {
+        /** @var EntityCollection<Attachment> */
+        return $this->relations->getMany('attachments');
+    }
+}