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.

NEW/tests/JdeScoping.DataSync.IntegrationTests/Infrastructure/BulkMergeTestEntityDataReader.cs

@@ -0,0 +1,34 @@
+using System.Data;
+using JdeScoping.DataSync.Generated;
+
+namespace JdeScoping.DataSync.IntegrationTests.Infrastructure;
+
+/// <summary>
+/// IDataReader implementation for BulkMergeTestEntity.
+/// </summary>
+public sealed class BulkMergeTestEntityDataReader : AsyncEnumerableDataReader<BulkMergeTestEntity>
+{
+    private static readonly string[] _columnNames = ["Id", "Name", "Amount", "LastUpdateDt"];
+    private static readonly Type[] _columnTypes = [typeof(int), typeof(string), typeof(decimal), typeof(DateTime)];
+
+    public BulkMergeTestEntityDataReader(IAsyncEnumerable<BulkMergeTestEntity> source) : base(source) { }
+
+    protected override string[] ColumnNames => _columnNames;
+
+    public static IReadOnlyList<string> GetColumnNames() => _columnNames;
+
+    protected override object GetColumnValue(int ordinal)
+    {
+        var entity = Current!;
+        return ordinal switch
+        {
+            0 => entity.Id,
+            1 => entity.Name,
+            2 => entity.Amount ?? (object)DBNull.Value,
+            3 => entity.LastUpdateDt,
+            _ => throw new IndexOutOfRangeException()
+        };
+    }
+
+    protected override Type GetColumnType(int ordinal) => _columnTypes[ordinal];
+}