Failing this (as I’ve seen a few posts asking about Rich Text functionality) what would be a recemmonded (I guess I mean tested) approach.
I was thinking perhaps some sort of table added to a template to explicitly hold links (like a ‘related items’ … or footnote type … [1] link here) - and then somehow having a JS function to add the link over the top of GoJS <- seems very hacky though)
Unfortunately the business case is to have a list (like a related items) in the process box of a flowchart - as the user is already clicking around objects to interact with the flowchart it wouldn’t be a great UX to allow clicking an object and being redirected.