Features:
- Extended User model with profile fields (first_name, last_name, phone, bio, preferred_language, timezone)
- Complete profile endpoints for viewing and updating user information
- Password update functionality with current password verification
- Email update functionality with duplicate email checking
- Account deletion endpoint
- Database migration for new profile fields
- Enhanced logging and error handling for all profile operations
- Updated API documentation with profile endpoints
Profile fields include:
- Personal information (name, phone, bio)
- Preferences (language, timezone)
- Account management (password, email updates)
- Timestamps (created_at, updated_at)
