Are we collecting Issue relationships data?

CollectOSS collects data on issues (such as label, assignee etc)

but relationships/dependencies between issues is a new feature (https://github.blog/changelog/2025-08-21-dependencies-on-issues/) that we may not be tracking.

This issue is for discussing and implementing some kind of tracking for this.

I imagine it may result in a new relationship table that allows `issues` in our DB to be linked to each other with some kind of type that mirrors github's system (but maybe is also independent enough to support similar such features on other forges too)