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/src/JdeScoping.Core/Interfaces/IUpdateProcessor.cs

@@ -0,0 +1,22 @@
+namespace JdeScoping.Core.Interfaces;
+
+/// <summary>
+/// Processor for data synchronization from JDE/CMS to local cache.
+/// </summary>
+public interface IUpdateProcessor
+{
+    /// <summary>
+    /// Runs a mass (full) data refresh.
+    /// </summary>
+    Task RunMassRefreshAsync(CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// Runs a daily incremental data refresh.
+    /// </summary>
+    Task RunDailyRefreshAsync(CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// Runs an hourly data refresh.
+    /// </summary>
+    Task RunHourlyRefreshAsync(CancellationToken cancellationToken = default);
+}