[O2B-1539] Add GPLv3 license header

Add missing CERN/ALICE GPLv3 license header to migration file.

Author: isaachilly

lib/database/migrations/v1/20260305110000-add-qcf-run-detector-index.js

@@ -1,3 +1,16 @@
+/*
+ *  @license
+ *  Copyright CERN and copyright holders of ALICE O2. This software is
+ *  distributed under the terms of the GNU General Public License v3 (GPL
+ *  Version 3), copied verbatim in the file "COPYING".
+ *
+ *  See http://alice-o2.web.cern.ch/license for full licensing information.
+ *
+ *  In applying this license CERN does not waive the privileges and immunities
+ *  granted to it by virtue of its status as an Intergovernmental Organization
+ *  or submit itself to any jurisdiction.
+ */
+
 'use strict';
 
 /** @type {import('sequelize-cli').Migration} */