Replaced the namespace import from `DigitalData.Core.DTO` to `DigitalData.Core.Abstraction.Application.DTO` in `BaseReadDto.cs`. Added an `Obsolete` attribute to indicate deprecation and recommend using `DigitalData.Core.Exceptions and .Middleware` instead. This change enhances code organization and clarity.
Updated namespaces for DTOs and services to improve project organization. Marked several interfaces as obsolete in favor of MediatR for better request handling. Simplified `BaseUpdateDto` and other DTOs by removing `IUnique<int>` implementation. Changed return types of `CreateAsync` methods to return corresponding read DTOs. Removed reference to `DigitalData.Core.DTO` in the project file, reflecting a shift in architecture for maintainability.
- Basis-DTOs für Lese-, Erstellungs- und Aktualisierungsvorgänge erstellt, um die Felder "hinzugefügt von", "hinzugefügt am", "geändert von" und "geändert am" automatisch über Middleware zu ergänzen.
- Diese Basiskomponenten in die Gruppenstruktur integriert.