feature: NEWS2 Composite Scoring Engine

VigilCareClinicalAPI/Models/Records/News2/News2CachedParam.cs

@@ -0,0 +1 @@
+public record News2CachedParam(decimal Value, int Score, DateTimeOffset RecordedAt);

VigilCareClinicalAPI/Models/Records/News2/News2ObservationEvent.cs

@@ -0,0 +1,6 @@
+public record News2ObservationEvent(
+    Guid ObservationId,
+    Guid EncounterId,
+    Guid PatientId,
+    string ObservationCode,
+    decimal Value);

VigilCareClinicalAPI/Models/Records/News2/News2Result.cs

@@ -0,0 +1,13 @@
+public record News2Result(
+    News2Outcome Outcome,
+    int? TotalScore = null,
+    string? RiskLevel = null,
+    bool AlertCreated = false,
+    int PresentParameters = 0,
+    bool HasSingleParamThree = false)
+{
+    public static readonly News2Result NotNews2Code = new(News2Outcome.NotNews2Code);
+
+    public static News2Result IncompleteParameters(int presentCount) =>
+        new(News2Outcome.IncompleteParameters, PresentParameters: presentCount);
+}

VigilCareClinicalAPI/Models/Records/News2/News2ScoreCursor.cs

@@ -0,0 +1,22 @@
+using System.Text;
+using System.Text.Json;
+
+public record News2ScoreCursor(DateTimeOffset CalculatedAt, Guid Id)
+{
+    public string Encode()
+    {
+        var json = JsonSerializer.Serialize(this);
+        return Convert.ToBase64String(Encoding.UTF8.GetBytes(json));
+    }
+
+    public static News2ScoreCursor? Decode(string? encoded)
+    {
+        if (string.IsNullOrEmpty(encoded)) return null;
+        try
+        {
+            var json = Encoding.UTF8.GetString(Convert.FromBase64String(encoded));
+            return JsonSerializer.Deserialize<News2ScoreCursor>(json);
+        }
+        catch { return null; }
+    }
+}