Adding Async versions of the overridden methods

[JJBussert]

This pull request refactors the SavingChanges methods in three database interceptors (CreatableInterceptor, ModifiableInterceptor, and SoftDeleteInterceptor) to improve code reuse and add asynchronous support. The changes include introducing a shared HandleEventData method in each class and implementing the SavingChangesAsync method for better handling of asynchronous database operations.

Refactoring for code reuse and consistency:

• Extracted shared logic into a new HandleEventData method in CreatableInterceptor, ModifiableInterceptor, and SoftDeleteInterceptor to handle entity state changes consistently. This method processes the ChangeTracker entries based on the specific entity types (ICreatable, IModifiable, IDeletable) and updates their audit fields. [1] [2] [3]

Asynchronous support:

• Added SavingChangesAsync methods to all three interceptors (CreatableInterceptor, ModifiableInterceptor, SoftDeleteInterceptor) to handle asynchronous database save operations, leveraging the CancellationToken parameter for cancellation support. [1] [2] [3]

Minor improvements:

• Renamed the data parameter to eventData in SavingChanges methods for better clarity and alignment with naming conventions. [1] [2] [3]