Initial commit (history squashed)

src/StellaOps.Feedser.Storage.Mongo/ChangeHistory/ChangeHistoryFieldChange.cs

@@ -0,0 +1,24 @@
+using System;
+
+namespace StellaOps.Feedser.Storage.Mongo.ChangeHistory;
+
+public sealed record ChangeHistoryFieldChange
+{
+    public ChangeHistoryFieldChange(string field, string changeType, string? previousValue, string? currentValue)
+    {
+        ArgumentException.ThrowIfNullOrEmpty(field);
+        ArgumentException.ThrowIfNullOrEmpty(changeType);
+        Field = field;
+        ChangeType = changeType;
+        PreviousValue = previousValue;
+        CurrentValue = currentValue;
+    }
+
+    public string Field { get; }
+
+    public string ChangeType { get; }
+
+    public string? PreviousValue { get; }
+
+    public string? CurrentValue { get; }
+}