namespace RackPeek.Domain.Resources.SystemResources.UseCases; public class AddSystemUseCase(ISystemRepository repository) { public async Task ExecuteAsync(string name) { // basic guard rails var existing = await repository.GetByNameAsync(name); if (existing != null) throw new InvalidOperationException($"System '{name}' already exists."); var system = new SystemResource { Name = name }; await repository.AddAsync(system); } }