- Updated package references to newer versions for `DigitalData.Auth.Client`, `DigitalData.Core.API`, `DigitalData.Core.Abstractions`, `DigitalData.Core.Application`, and `DigitalData.EmailProfilerDispatcher.Abstraction`.
- Changed `UserManager.Domain` package version from `3.0.2` to `3.1.0` and updated assembly and file versions.
- Removed `IUnique<int>` interface implementation from `BaseEntity`, `ClientUser`, `Module`, and `ModuleOfUser`.
- Added data annotations to the `User` class for various properties that were previously commented out.
- Updated `Microsoft.EntityFrameworkCore` package references in the `Infrastructure` project for `net7.0` and `net9.0`.
- Modified solution configuration to change a project's build configuration from Debug to Release.
- `IUnique`-Schnittstelle in allen Entitäten implementiert.
- Interface für DbContext erstellt und DbSet-Eigenschaften in den Konstruktoren über Repositories injiziert.
