Initial commit: JDE Scoping Tool migration project

Set up repository with legacy .NET Framework 4.8 source (OLD/),
new .NET 10 Blazor solution (NEW/), OpenSpec specifications,
documentation, and project configuration.

OLD/DataModel/Models/StatusUpdate.cs

@@ -0,0 +1,20 @@
+using System;
+
+namespace DataModel.Models
+{
+    /// <summary>
+    /// Process status update message
+    /// </summary>
+    public class StatusUpdate
+    {
+        /// <summary>
+        /// Update message to display
+        /// </summary>
+        public string Message { get; set; }
+
+        /// <summary>
+        /// Timestamp message was sent
+        /// </summary>
+        public DateTime Timestamp { get; set; }
+    }
+}