Assert whether indices cause significant contention on write requests

[Jotschi]

The UUID property has a unique constraint. I suspect this property will be set for all graph elements (edges and vertices). It would perhaps be better to only use the index on core vertices, edges. Additionally we should check whether the segment path properties and url link are also affected.

Testing this could be simple. It may be possible to remove the uniqueness flag or the index for those indices in the odb studio.

[Jotschi]

I raised this question in (non public) https://www.prjhub.com/#/issues/10856