Updated namespaces to align with the new DigitalData.Core structure, replacing `DigitalData.Core.Abstractions` with `DigitalData.Core.Application.Interfaces` and `DigitalData.Core.Client.Interface`. Removed the `IUnique<int>` interface from several DTOs, simplifying their design and altering the handling of entity identification. Updated project files to reflect new dependency versions for improved compatibility and features. Cleaned up using directives to remove obsolete references, enhancing code maintainability.
Updated repository and service interfaces to use async methods for retrieving receiver information. Changed method signatures to include optional parameters for `id` and `signature`, and made existing parameters nullable. Adjusted related service and controller implementations to ensure consistent usage of the new async methods. Improved error handling in the repository to enforce parameter requirements. Updated using directives in the repository for necessary dependencies.
- Repository-Schnittstellen wurden in die Anwendungsschicht verschoben.
- Erweiterungsmethoden für die Injektion von Repository-Abhängigkeiten wurden in die Infrastruktur verschoben.
