feat: add exam score management

apps/server/src/archive/archive.boundaries.spec.ts

@@ -67,6 +67,22 @@ describe('ArchiveService — resource and relationship boundaries', () => {
     expect(exam.save).not.toHaveBeenCalled();
   });
 
+  it('keeps exam-management scores read-only in the student archive', async () => {
+    const exam = {
+      findOne: jest.fn().mockResolvedValue({ id: 3, studentId: 7, examId: 8 }),
+      save: jest.fn(),
+      update: jest.fn(),
+    };
+    const service = createService({ exam });
+
+    await expect(service.updateExamScore(3, { score: 95 })).rejects.toBeInstanceOf(
+      BadRequestException,
+    );
+    await expect(service.deleteExamScore(3)).rejects.toBeInstanceOf(BadRequestException);
+    expect(exam.save).not.toHaveBeenCalled();
+    expect(exam.update).not.toHaveBeenCalled();
+  });
+
   it('rejects a missing attachment upload before writing to disk', async () => {
     const service = createService({ student: { findOne: jest.fn() } });
     await expect(service.addAttachment(7, undefined as never, 'other')).rejects.toBeInstanceOf(