refactor: address code review findings across all projects

Apply comprehensive fixes from code reviews including:
- Extract shared utilities (SqlFormatHelper, CellValueConverter, DbDestinationBase)
- Add interface abstractions (IAuthenticationService, IDatabaseMigrator, IMisQueryBuilder)
- Implement SecureStore for encrypted secrets storage
- Fix error handling with proper HTTP status codes and logging
- Optimize double enumeration in DevEtlRegistry
- Add DataSync.Dev README for developer onboarding
- Extract filter panel base classes to reduce duplication
- Update code review docs to mark all issues as fixed

NEW/src/JdeScoping.Core/ViewModels/OperatorViewModel.cs

@@ -5,7 +5,7 @@ namespace JdeScoping.Core.ViewModels;
 /// </summary>
 public class OperatorViewModel
 {
-    public int AddressNumber { get; set; }
+    public long AddressNumber { get; set; }
     public string UserId { get; set; } = string.Empty;
     public string FullName { get; set; } = string.Empty;