Added Event Tracking!

wolverine/a-frame-architecture/FinancialApi/DemoEventStore.cs

@@ -0,0 +1,13 @@
+using FinancialApi.Application;
+
+namespace FinancialApi;
+
+public class DemoEventStore : IEventTracker
+{
+    public List<string> CapturedEvents { get; } = new();
+
+    public void Add(string eventMessage)
+    {
+        CapturedEvents.Add($"[{DateTimeOffset.UtcNow:HH:mm:ss}] {eventMessage}");
+    }
+}