refactor: remove unused classes and consolidate ViewModels in Core

Remove 9 unused types from Core (duplicate extension classes, TableSpec, ColumnSpec, LotLocation), move ComponentLotViewModel and OperatorViewModel from Client to Core, and refactor DataSync.Dev to use pipeline-based configuration. Fix Login.razor to use UserInfoDto directly.

NEW/src/JdeScoping.Client/Services/AuthService.cs

@@ -1,6 +1,5 @@
 using System.Net.Http.Json;
 using JdeScoping.Client.Auth;
-using JdeScoping.Client.Models;
 using JdeScoping.Core.Models.Auth;
 
 namespace JdeScoping.Client.Services;
@@ -43,17 +42,8 @@ public class AuthService : IAuthService
 
             if (result.Success && result.User is not null)
             {
-                // Notify auth state provider of the login
-                var userViewModel = new UserInfoViewModel
-                {
-                    Username = result.User.Username,
-                    FirstName = result.User.FirstName,
-                    LastName = result.User.LastName,
-                    DisplayName = result.User.DisplayName,
-                    EmailAddress = result.User.EmailAddress,
-                    Title = result.User.Title
-                };
-                await _authStateProvider.MarkUserAsAuthenticated(userViewModel);
+                // LoginResultModel.User is already UserInfoDto - pass directly
+                await _authStateProvider.MarkUserAsAuthenticated(result.User);
             }
 
             return result;