Initial commit: teaching institution management API.

Express/MongoDB backend with JWT auth, RBAC, S3 uploads, notifications, and scheduled jobs.

middlewares/notFoundHandler.js

@@ -0,0 +1,9 @@
+// /middlewares/notFoundHandler.js
+
+const AppError = require('../utils/AppError');
+
+const notFoundHandler = (req, res, next) => {
+  next(new AppError('NOT_FOUND', { path: req.originalUrl, method: req.method }));
+};
+
+module.exports = notFoundHandler;