Update quiz attempt detail scoring to determine correctness from Choice.is_correct instead of StudentAnswer.is_correct and calculate earned score based on correctness. Add YouTube video support to getLessonContent endpoint by checking LessonAttachment for YouTube videos (mime_type 'video/youtube') and building YouTube URLs from video IDs. Ad
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
Add is_skippable boolean field to Quiz schema, update quiz creation and update logic to handle the new field, and include it in student course content responses. Update seed data and type definitions accordingly.
Update quiz submission response to respect the show_answers_after_completion setting by conditionally including the correct_answers count. When show_answers_after_completion is false, correct_answers is now undefined instead of being exposed.
