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/Auth/UserStorageService.cs

@@ -1,5 +1,5 @@
 using System.Text.Json;
-using JdeScoping.Client.Models;
+using JdeScoping.Core.ApiContracts.Auth;
 using Microsoft.JSInterop;
 
 namespace JdeScoping.Client.Auth;
@@ -19,7 +19,7 @@ public class UserStorageService : IUserStorageService
         _jsRuntime = jsRuntime;
     }
 
-    public async Task<UserInfoViewModel?> GetUserAsync()
+    public async Task<UserInfoDto?> GetUserAsync()
     {
         try
         {
@@ -29,7 +29,7 @@ public class UserStorageService : IUserStorageService
                 return null;
             }
 
-            return JsonSerializer.Deserialize<UserInfoViewModel>(json, new JsonSerializerOptions
+            return JsonSerializer.Deserialize<UserInfoDto>(json, new JsonSerializerOptions
             {
                 PropertyNameCaseInsensitive = true
             });
@@ -40,7 +40,7 @@ public class UserStorageService : IUserStorageService
         }
     }
 
-    public async Task SetUserAsync(UserInfoViewModel user)
+    public async Task SetUserAsync(UserInfoDto user)
     {
         var json = JsonSerializer.Serialize(user);
         await _jsRuntime.InvokeVoidAsync("jdeScopingInterop.setSessionStorage", UserKey, json);