feat: add four new student modules (rotation, skill-video, exam-prep, academic) with backend APIs and frontend pages; add exam-prep question history with DB persistence

tsconfig.build.json

@@ -0,0 +1,4 @@
+{
+  "extends": "./tsconfig.json",
+  "exclude": ["node_modules", "test", "dist", "**/*.spec.ts"]
+}