Add genetic grain

src/Managing.Domain/Backtests/GeneticBacktestMetadata.cs

@@ -0,0 +1,26 @@
+using Orleans;
+
+namespace Managing.Domain.Backtests;
+
+/// <summary>
+/// Metadata class for genetic algorithm backtests.
+/// This class is designed to be Orleans-serializable.
+/// </summary>
+[GenerateSerializer]
+public class GeneticBacktestMetadata
+{
+    [Id(0)] public int Generation { get; set; }
+    [Id(1)] public string RequestId { get; set; } = string.Empty;
+    [Id(2)] public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
+
+    public GeneticBacktestMetadata()
+    {
+    }
+
+    public GeneticBacktestMetadata(int generation, string requestId = null)
+    {
+        Generation = generation;
+        RequestId = requestId ?? string.Empty;
+        CreatedAt = DateTime.UtcNow;
+    }
+}