message: fix: added class-validator on check-test property
diff: +import { IsEnum, IsNotEmpty } from 'class-validator';
  +
  export enum ChosenAlternativeEnum {
  A = 'A',
  B = 'B',
  @@ -6,6 +8,8 @@ export enum ChosenAlternativeEnum {
  }
  export class CheckTestBodyDTO {
  + @IsNotEmpty()
  + @IsEnum(ChosenAlternativeEnum)
  chosenAlternative: ChosenAlternativeEnum;
  }
  