Refactored `AnnotationController` to simplify `DocSignedNotification` creation and improve error handling. Replaced the `ToDocSignedNotification` extension method with direct instantiation of `DocSignedNotification`. Introduced a `try-catch` block to handle exceptions during notification publishing, ensuring a `RemoveSignatureNotification` is sent on failure.
Removed `ToDocSignedNotification` and `PublishSafely` extension methods, as their functionality was inlined into the controller. Updated tests to reflect these changes. Simplified the `DocSignedNotification` class by removing redundant methods.
Improved maintainability and clarity by reducing dependencies on extension methods and handling exceptions explicitly.
All test files and utilities now use the EnvelopeGenerator.Tests.Application namespace for improved organization and clarity. No functional changes were made; updates are limited to namespaces and using directives. This makes it explicit that these are application-level tests and related helpers.
