chore(deps): update typescript-eslint monorepo to v8.64.0

shared/lib/Mail/Provider/ProviderBaseInterface.php

@@ -22,17 +22,6 @@ use KTXF\Resource\Provider\ResourceProviderBaseInterface;
 interface ProviderBaseInterface extends ResourceProviderBaseInterface{
 
     public const JSON_TYPE = 'mail:provider';
-
-    /**
-     * Reserved user identifier for system-owned mail services
-     *
-     * Services stored under this user id belong to the tenant itself rather
-     * than any real user (e.g. accounts used to deliver system-generated
-     * messages such as verification codes and password resets).
-     *
-     * @since 2026.07.01
-     */
-    public const USER_SYSTEM = 'system';
     
     /**
      * Finds a service that handles a specific email address