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

components/courses/courseService.js

@@ -39,7 +39,10 @@ const getCourseById = async (id, { publicOnly = false } = {}) => {
   const filter = { _id: id };
   if (publicOnly) filter.showOnFrontend = { $ne: false };
 
-  const course = await Course.findOne(filter).populate('professor', 'name surname title expertise email phoneNumber');
+  const course = await Course.findOne(filter).populate({
+    path: 'professor',
+    populate: { path: 'user', select: 'name surname title expertise email phoneNumber' }
+  });
   if (!course) {
     throw new AppError('COURSE_NOT_FOUND');
   }
@@ -69,7 +72,14 @@ const getAllCourses = async (queryParams, { publicOnly = false } = {}) => {
   }
 
   const [courses, totalCount] = await Promise.all([
-    Course.find(filter).populate('professor', 'name surname').sort(finalSort).skip(skip).limit(limit),
+    Course.find(filter)
+      .populate({
+        path: 'professor',
+        populate: { path: 'user', select: 'name surname' }
+      })
+      .sort(finalSort)
+      .skip(skip)
+      .limit(limit),
     Course.countDocuments(filter)
   ]);