рефакторинг
public class CreateVehicleHandler : ICommandHandler<CreateVehicleCommand, ErrorOr<VehicleResponse>>
{
    private readonly IMapper _mapper;
    private readonly IUnitOfWork _unitOfWork;
    private readonly ParamService _paramService;
    private readonly IUserInfoProvider _userInfoProvider;
    private readonly IVehicleRepository _vehicleRepository;
    private readonly IModelRepository _modelRepository;
    private readonly IBodyTypeRepository _bodyTypeRepository;
    private readonly FavouritesService _favouritesService;
    private readonly IUserServerHttpClient _userServerHttpClient;
    private readonly ICommonServerHttpClient _commonServerHttpClient;
    private readonly IFinanceServerHttpClient _financeServerHttpClient;
    private readonly ISolrRepository<SolrVehicleModel> _solrRepository;

    public CreateVehicleHandler(IMapper mapper,
                                IUnitOfWork unitOfWork,
                                ParamService paramService,
                                IVehicleRepository vehicleRepository,
                                IModelRepository modelRepository,
                                IBodyTypeRepository bodyTypeRepository,
                                IUserInfoProvider userInfoProvider,
                                FavouritesService favouritesService,
                                IUserServerHttpClient userServerHttpClient,
                                ICommonServerHttpClient commonServerHttpClient,
                                IFinanceServerHttpClient financeServerHttpClient,
                                ISolrRepository<SolrVehicleModel> solrRepository)
    {
        _mapper = mapper;
        _unitOfWork = unitOfWork;
        _paramService = paramService;
        _userInfoProvider = userInfoProvider;
        _favouritesService = favouritesService;
        _userServerHttpClient = userServerHttpClient;
        _commonServerHttpClient = commonServerHttpClient;
        _financeServerHttpClient = financeServerHttpClient;
        _solrRepository = solrRepository;
        _vehicleRepository = vehicleRepository;
        _modelRepository = modelRepository;
        _bodyTypeRepository = bodyTypeRepository;
    }

    public async Task<ErrorOr<VehicleResponse>> Handle(CreateVehicleCommand request, CancellationToken cancellationToken)
    {
        var newVehicleParams = await _paramService.GetVehicleParamFromRequest(request.Parameters, cancellationToken);

        var newPriceOverrides = request.PriceOverrides?
                                       .Selec Wrap the entire output in JSON format.
user