The Kyutai open-source model turned out not to be production-ready:
it caused disruptions in the production environment, especially on
long-running meeting sessions.
Switch to the Voxtral realtime model, which looks like a
credible competitor and behaves much better in our setup.
For now, the code handling the Voxtral realtime API lives directly
in the project. It could be extracted into an open-source package
later.
See PR #1277 for the full details of the implementation, proposed
by @cameldev.