Handle UnavailableType when creating an Attribute#408

fgather merged 1 commit intomainTNG/ArchUnitNET:mainfrom

398-archloaderbuild-throws-exception-if-project-file-contains-usersecretsid-attributeTNG/ArchUnitNET:398-archloaderbuild-throws-exception-if-project-file-contains-usersecretsid-attributeCopy head branch name to clipboard