Marker interface for relation type DTOs that are used as request input
(create/update). The dedicated Cobra.People360.Api.SeedWork.Converters.RelationTypeInputConverter resolves the
concrete input DTO deterministically by Cobra.People360.Api.Application.DTOs.IRelationTypeDTO.TypeIdentifier,
so the input/output direction is never guessed from the payload content.
{
"typeIdentifier": "string",
"isFavorite": true
}