feat: add instructor endpoints for student progress tracking and quiz score management

Add four new instructor endpoints: getEnrolledStudents to view all enrolled students with progress, getQuizScores to view quiz scores for all students in a lesson, getQuizAttemptDetail to view detailed quiz attempt for a specific student, and searchStudents to search enrolled students by name/email/username. Add getQuizAttempts endpoint for students to retrieve their own quiz attempt history. All endpoints include

Backend/src/controllers/CoursesStudentController.ts

@@ -13,6 +13,7 @@ import {
     CompleteLessonResponse,
     SubmitQuizResponse,
     SubmitQuizBody,
+    GetQuizAttemptsResponse,
 } from '../types/CoursesStudent.types';
 import { EnrollmentStatus } from '@prisma/client';
 
@@ -234,4 +235,32 @@ export class CoursesStudentController {
             answers: body.answers,
         });
     }
+
+    /**
+     * ดึงคะแนน Quiz ที่เคยทำ
+     * Get quiz attempts and scores for a lesson
+     * @param courseId - รหัสคอร์ส / Course ID
+     * @param lessonId - รหัสบทเรียน / Lesson ID
+     */
+    @Get('courses/{courseId}/lessons/{lessonId}/quiz/attempts')
+    @Security('jwt', ['student'])
+    @SuccessResponse('200', 'Quiz attempts retrieved successfully')
+    @Response('401', 'Invalid or expired token')
+    @Response('403', 'Not enrolled in this course')
+    @Response('404', 'Lesson or quiz not found')
+    public async getQuizAttempts(
+        @Request() request: any,
+        @Path() courseId: number,
+        @Path() lessonId: number
+    ): Promise<GetQuizAttemptsResponse> {
+        const token = request.headers.authorization?.replace('Bearer ', '');
+        if (!token) {
+            throw new ValidationError('No token provided');
+        }
+        return await this.service.getQuizAttempts({
+            token,
+            course_id: courseId,
+            lesson_id: lessonId,
+        });
+    }
 }