Documents added to a conversation stay easier to reference

Documents attached to a conversation now feel more like part of the discussion, not like separate files you need to keep explaining again.

Ordalie better preserves the link between the conversation and the documents you add to it. That makes follow-up questions, comparisons, and later references easier to handle as the conversation evolves.

It is a small change in the background, but it should make document-heavy conversations feel more predictable.