DM: Change CodeListElement from EmbeddedObject to LogisticsObject

[NiclasScheiber]

In order to facilitate fixed @id for CodeListElements to make them queryable inside LogisticsEvents, I propose to make CodeListElement inherit from LogisticsObject. This allows to host codes as re-usable objects while following the new recommended URI structures.

Structure:
@id: {{baseURL}}/{{codeListName}}#{{code}}

Example:
https://data_holder.org/logistics-objects/handlingCodes#ABC

[NiclasScheiber]

#256

[aloccid-iata]

I think is a good suggestion, we need @id to be able to search with event-code. On the contrary, logistics objects have some properties that we do not need in the codelistelement. Maybe we can instantiate them as logistics objects but we can avoid having all properties. Something to discuss in details

[lambertciata]

See: 3cd15b8