Generate a Mantara schema from this UI specification:

Menu: Student Management
  Submenu: Student Registration
    Fields: first_name, last_name, date_of_birth, gender, enrollment_date, program_id, email, phone, address, guardian_name, guardian_phone
  Submenu: Student Profiles
    Fields: student_id, photo_url, bio, gpa, academic_standing, advisor_id

Menu: Academic Programs
  Submenu: Program Catalog
    Fields: program_name, department, degree_level, total_credits, duration_years, description, is_active
  Submenu: Course Management
    Fields: course_name, course_code, program_id, credits, semester, instructor_id, max_enrollment, description
  Submenu: Class Scheduling
    Fields: course_id, room_number, day_of_week, start_time, end_time, semester, academic_year

Menu: Faculty
  Submenu: Faculty Directory
    Fields: first_name, last_name, email, phone, department, title, hire_date, office_location
  Submenu: Teaching Assignments
    Fields: faculty_id, course_id, semester, academic_year, role

Menu: Grades and Transcripts
  Submenu: Grade Entry
    Fields: student_id, course_id, semester, academic_year, grade, grade_points, instructor_id
  Submenu: Transcript Generation
    Fields: student_id, cumulative_gpa, total_credits_earned, total_credits_attempted, academic_standing, generated_at

Menu: Administration
  Submenu: User Accounts
    Fields: username, password_hash, email, role, is_active, last_login
  Submenu: System Configuration
    Fields: config_key, config_value, description, last_modified