public class Patient
{
    public Guid Id { get; set; }
    public string Mrn { get; set; } = null!;
    public string FullName { get; set; } = null!;
    public DateOnly? DateOfBirth { get; set; }
    public string? Sex { get; set; }
    public BloodType? BloodType { get; set; }
    public string? EmergencyContact { get; set; }
    public string? AllergiesJson { get; set; }
    public bool NoKnownAllergies { get; set; }
    public DateTimeOffset CreatedAt { get; set; }
    public DateTimeOffset UpdatedAt { get; set; }
}