public record FhirEncounterUpsertRequest(
    string IdentifierSystem,
    string IdentifierValue,
    Guid PatientId,
    EncounterType EncounterType,
    Department Department,
    string AttendingPhysician,
    EncounterStatus TargetStatus,
    DateTimeOffset? AdmittedAt = null,
    string? RoomBed = null,
    string? AdmissionReason = null,
    string? DischargeDiagnosis = null);