- Increase max_length from 100 to 255 for first_name and last_name encrypted fields
- Increase phone field max_length from 20 to 255 to accommodate encryption overhead
- Add 'id' field to AppointmentRequest admin list_display for easier reference
- Remove redundant docstring from _convert_to_datetime method
The increased field lengths ensure adequate storage for encrypted data, which typically requires more space than plaintext values.
