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.Infrastructure.Tests/Unit/LdapAuthServiceTests.cs

@@ -74,16 +74,6 @@ public class LdapAuthServiceTests
         result.ErrorMessage.ShouldBe("Unable to connect to directory server");
     }
 
-    [Fact]
-    public void GetUserInfoAsync_ThrowsNotSupportedException()
-    {
-        // Arrange
-        var service = new LdapAuthService(_ldapOptions, _logger);
-
-        // Act & Assert
-        Should.Throw<NotSupportedException>(() => service.GetUserInfoAsync("user").GetAwaiter().GetResult());
-    }
-
     [Fact]
     public async Task AuthenticateAsync_AdminBypassUser_ConfigurationIsRecognized()
     {