RelatedTopics should get parameter "IncludeInverse"

[GeorgDangl]

There should be an optional query parameter added to the GET Related Topics Service that would optionally include all reverse relations for related topics.

[GeorgDangl]

See #40

[GeorgDangl]

See also #280 for relation types.

We've had a quick idea in the call that there should be separate resource directly below projects that gives a list of all topic relations in a project.

[GeorgDangl]

We've just started discussing this before the call ended, but we might go a route of changing the related topics endpoint altogether.

Instead of being a resource below every single topic, it could be lifted to a dedicated resource right below projects to give a list of all relations, like this:

[{
    "left": "db49df2b-0e42-473b-a3ee-f7b785d783c4",
    "right": "6963a846-54d1-4050-954d-607cd5e48aa3",
    "type": "parent"
}]

[GeorgDangl]

Additional Discussion / 19.06.2023

• Having relations as a separate resource in the API could be cumbersome to work with, it's preferred to have the relations within the topic.
• Relationship types: child, parent, relation
• The project extensions can be used to announce which relation types are available in a project

[jasollien]

Aconex does not support "related topics at the moment"
Catenda uses two-ways relations always. (Meaning we are always include the inverse)

Suggestion from todays telecon. Close the ticket (and continue to use two-way relations always)