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/JdeUser.cs

@@ -0,0 +1,56 @@
+using System;
+using DataModel.Helpers;
+using DataModel.ViewModels;
+
+namespace DataModel.Models
+{
+    /// <summary>
+    /// JDE user model
+    /// </summary>
+    public class JdeUser
+    {
+        /// <summary>
+        /// User unique address number
+        /// </summary>
+        public long AddressNumber { get; set; }
+
+        /// <summary>
+        /// User unique login ID
+        /// </summary>
+        public string UserID { get; set; }
+
+        /// <summary>
+        /// User's full name (last, first [middle initial])
+        /// </summary>
+        public string FullName { get; set; }
+
+        /// <summary>
+        /// Date of last update to record
+        /// </summary>
+        private int LastUpdateDate { get; }
+
+        /// <summary>
+        /// Time of day of last update to record
+        /// </summary>
+        private int LastUpdateTime { get; }
+
+        /// <summary>
+        /// Timestamp of last update to record
+        /// </summary>
+        public DateTime LastUpdateDT => LastUpdateDate.FromJDEDate().FromJDEDateTime(LastUpdateTime);
+
+        /// <summary>
+        /// Converts object to view model
+        /// </summary>
+        /// <returns>Projected view model for object</returns>
+        public JdeUserViewModel ToViewModel()
+        {
+            return new JdeUserViewModel()
+            {
+                AddressNumber = AddressNumber,
+                UserID = UserID,
+                FullName = FullName
+            };
+        }
+    }
+}