feature: Ward Gateway Service (Local-First Clinical Path)

VigilCare.WardGateway/Domain/Entities/BufferedSyncItem.cs

@@ -0,0 +1,12 @@
+public class BufferedSyncItem
+{
+    public Guid Id { get; set; }
+    public BufferedSyncItemType ItemType { get; set; }
+    public string Payload { get; set; } = null!;
+    public string IdempotencyKey { get; set; } = null!;
+    public Guid EncounterId { get; set; }
+    public DateTimeOffset RecordedAt { get; set; }
+    public bool Synced { get; set; }
+    public DateTimeOffset? SyncedAt { get; set; }
+    public DateTimeOffset CreatedAt { get; set; }
+}

VigilCare.WardGateway/Domain/Entities/GatewaySyncState.cs

@@ -0,0 +1,6 @@
+public class GatewaySyncState
+{
+    public Guid Id { get; set; }
+    public DateTimeOffset? LastEncounterSyncAt { get; set; }
+    public bool InitialSyncCompleted { get; set; }
+}

VigilCare.WardGateway/Domain/Entities/LocalClinicalAlert.cs

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+public class LocalClinicalAlert
+{
+    public Guid Id { get; set; }
+    public Guid EncounterId { get; set; }
+    public Guid PatientId { get; set; }
+    public Guid? ObservationId { get; set; }
+    public AlertType AlertType { get; set; }
+    public AlertSeverity Severity { get; set; }
+    public string Details { get; set; } = null!;
+    public string? ObservationCode { get; set; }
+    public AlertStatus Status { get; set; } = AlertStatus.Open;
+    public DateTimeOffset? AcknowledgedAt { get; set; }
+    public string? AcknowledgedBy { get; set; }
+    public DateTimeOffset? ResolvedAt { get; set; }
+    public DateTimeOffset TriggeredAt { get; set; }
+    public Guid ClientAlertId { get; set; }
+
+    public ReplicaEncounter Encounter { get; set; } = null!;
+}

VigilCare.WardGateway/Domain/Entities/LocalObservation.cs

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+public class LocalObservation
+{
+    public Guid Id { get; set; }
+    public Guid EncounterId { get; set; }
+    public string ObservationCode { get; set; } = null!;
+    public decimal Value { get; set; }
+    public string Unit { get; set; } = null!;
+    public ObservationSource Source { get; set; } = ObservationSource.Manual;
+    public string? IdempotencyKey { get; set; }
+    public DateTimeOffset RecordedAt { get; set; }
+    public DateTimeOffset CreatedAt { get; set; }
+
+    public ReplicaEncounter Encounter { get; set; } = null!;
+}

VigilCare.WardGateway/Domain/Entities/ReplicaAlertThreshold.cs

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+public class ReplicaAlertThreshold
+{
+    public Guid Id { get; set; }
+    public string ObservationCode { get; set; } = null!;
+    public string DisplayName { get; set; } = null!;
+    public string Unit { get; set; } = null!;
+    public decimal? CriticalLow { get; set; }
+    public decimal? WarningLow { get; set; }
+    public decimal? WarningHigh { get; set; }
+    public decimal? CriticalHigh { get; set; }
+    public int? SuppressionWindowMinutes { get; set; }
+    public DateTimeOffset SyncedAt { get; set; }
+}

VigilCare.WardGateway/Domain/Entities/ReplicaEncounter.cs

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+public class ReplicaEncounter
+{
+    public Guid Id { get; set; }
+    public Guid PatientId { get; set; }
+    public EncounterType EncounterType { get; set; } = EncounterType.Inpatient;
+    public EncounterStatus Status { get; set; }
+    public Department Department { get; set; }
+    public string AttendingPhysician { get; set; } = null!;
+    public string? RoomBed { get; set; }
+    public DateTimeOffset AdmittedAt { get; set; }
+    public DateTimeOffset SyncedAt { get; set; }
+
+    public ReplicaPatient Patient { get; set; } = null!;
+    public ICollection<LocalObservation> Observations { get; set; } = new List<LocalObservation>();
+    public ICollection<LocalClinicalAlert> Alerts { get; set; } = new List<LocalClinicalAlert>();
+}

VigilCare.WardGateway/Domain/Entities/ReplicaPatient.cs

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+public class ReplicaPatient
+{
+    public Guid Id { get; set; }
+    public string Mrn { get; set; } = null!;
+    public string FirstName { get; set; } = null!;
+    public string LastName { get; set; } = null!;
+    public DateOnly DateOfBirth { get; set; }
+    public string Gender { get; set; } = null!;
+    public DateTimeOffset SyncedAt { get; set; }
+
+    public ICollection<ReplicaEncounter> Encounters { get; set; } = new List<ReplicaEncounter>();
+}

VigilCare.WardGateway/Domain/Entities/SyncOutboxEntry.cs

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+public class SyncOutboxEntry
+{
+    public Guid Id { get; set; }
+    public Guid? BatchId { get; set; }
+    public SyncOutboxStatus Status { get; set; } = SyncOutboxStatus.Pending;
+    public DateTimeOffset CreatedAt { get; set; }
+    public DateTimeOffset? SubmittedAt { get; set; }
+}