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/WebInterface/Models/RefreshStatusModel.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using DataModel.Models;
+
+namespace WebInterface.Models
+{
+    /// <summary>
+    /// Data refresh status model
+    /// </summary>
+    public class RefreshStatusModel
+    {
+        /// <summary>
+        /// Minimum timestamp get results for
+        /// </summary>
+        public DateTime MinDT { get; set; }
+
+        /// <summary>
+        /// Maximum timestamp to get results for
+        /// </summary>
+        public DateTime MaxDT { get; set; }
+
+        /// <summary>
+        /// Cache update results for given timespan
+        /// </summary>
+        public List<DataUpdate> Results { get; set; }
+    }
+}