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/Entities/Template.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
@@ -38,9 +38,11 @@ class Template extends Entity
 
     public const STATUS_ACTIVE = 'Active';
 
+    public const string FIELD_ENTITY_TYPE = 'entityType';
+
     public function getTargetEntityType(): string
     {
-        $entityType = $this->get('entityType');
+        $entityType = $this->get(self::FIELD_ENTITY_TYPE);
 
         if ($entityType === null) {
             throw new UnexpectedValueException();
@@ -53,4 +55,9 @@ class Template extends Entity
     {
         return $this->get('status') === self::STATUS_ACTIVE;
     }
+
+    public function getFilename(): ?string
+    {
+        return $this->get('filename');
+    }
 }