Compaction/summary llm call should inherit the sessions transport settings.

[xl0]

What happened?

I had gpt--5.6-luna selected as the model for the session. Luna is known to not work ver sse for the moment.
In the settings, I hadve websocket set as transport, but a compaction failed because the compaction call used sse instead of inhereting the session transport settings.

Steps to reproduce

^^

Expected behavior

I'll send PR in a sec

Version

No response