Introduced `CfgProfileDto` for testing and added a `FakeDataGenerator` utility for generating test data. Updated `ECMJobRunner.Tests.csproj` to support both `.NET Framework 4.8` and `.NET 8.0`, enabling nullable reference types and adding dependencies for testing frameworks, DI, and AutoMapper.
Added `TestFixture` to set up dependency injection and in-memory databases for tests. Created `TestMappingProfile` for AutoMapper configurations. Implemented `CfgProfileRepositoryTests` to validate repository methods, including `GetByIdAsync`, `GetAllAsync`, `AddAsync`, and `FindAsync`.
Enhanced test maintainability with `FluentAssertions` and realistic data generation using `Bogus`.