- Updated MedicalHistoryController to use MediatR for commands/queries
- Refactored methods in MedicalHistoryController to use expression-bodied members
- Added HospitalId property to CurrentUserService
- Removed UniversityId claims handling from JwtService
- Updated AccountService to handle Student entities with UniversityId and SectionId
- Removed IMedicalHistoryService interface and its implementation
- Removed UniversityId and SectionId handling from UserService
- Added SectionId property to SignUpRequestDto
- Refactored MedicalHistory entity to remove personal information properties
- Added CreateMedicalHistoryCommand, UpdateMedicalHistoryCommand, and DeleteMedicalHistoryCommand
- Added command handlers for medical history commands