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/tests/JdeScoping.Api.Tests/Controllers/AuthControllerTests.cs

@@ -14,6 +14,11 @@ using Microsoft.Extensions.Logging;
 using NSubstitute;
 using Shouldly;
 
+// Alias to avoid conflict with JdeScoping.Core.Interfaces.IAuthenticationService
+using IAspNetAuthService = Microsoft.AspNetCore.Authentication.IAuthenticationService;
+// Alias to match AuthController naming convention
+using IAuthService = JdeScoping.Core.Interfaces.IAuthenticationService;
+
 namespace JdeScoping.Api.Tests.Controllers;
 
 public class AuthControllerTests
@@ -186,14 +191,14 @@ public class AuthControllerTests
 
     private static HttpContext CreateMockHttpContext()
     {
-        var authServiceMock = Substitute.For<IAuthenticationService>();
+        var authServiceMock = Substitute.For<IAspNetAuthService>();
         authServiceMock.SignOutAsync(Arg.Any<HttpContext>(), Arg.Any<string>(), Arg.Any<AuthenticationProperties>())
             .Returns(Task.CompletedTask);
         authServiceMock.SignInAsync(Arg.Any<HttpContext>(), Arg.Any<string>(), Arg.Any<ClaimsPrincipal>(), Arg.Any<AuthenticationProperties>())
             .Returns(Task.CompletedTask);
 
         var serviceProvider = Substitute.For<IServiceProvider>();
-        serviceProvider.GetService(typeof(IAuthenticationService)).Returns(authServiceMock);
+        serviceProvider.GetService(typeof(IAspNetAuthService)).Returns(authServiceMock);
 
         var httpContext = new DefaultHttpContext
         {