chore: add MPL license headers to all source files (#2977)

cypress/e2e/audit-trails.cy.ts

@@ -1,3 +1,11 @@
+/**
+ * Copyright since 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
 describe('Audit Trails', () => {
   // Test data constants for easy maintenance
   const TEST_USER = {

cypress/e2e/spec.cy.ts

@@ -1,3 +1,11 @@
+/**
+ * Copyright since 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
 describe('Login Page', () => {
   it('Visits the initial web page', () => {
     cy.visit('/');