fix(professors, settings): add auto-migration for legacy professors, deep populate user in class/session/course services, and fix SMS bypass number persistence

app.js

@@ -122,6 +122,9 @@ const PORT = config.PORT || 3000;
 const startServer = async () => {
   await connectDB();
 
+  const { migrateAndLinkProfessorsToUsers } = require('./components/professors/professorMigration');
+  await migrateAndLinkProfessorsToUsers();
+
   if (config.NODE_ENV === 'production') {
     logger.info('Running production bootstrap (roles + SuperAdmin from env)');
     await seedDatabase({ disconnectOnComplete: false });