cync_lan (Home Assistant custom_component) v2.9.1

Requires cync-lan 0.9.2. 2.9.0 shipped cloud passthrough against a library
release with two bugs in that exact path, both found by new end-to-end tests
that drive the server over a real socket rather than a mocked one:

• stop_proxy() caught Exception around an await on a task it had just
  cancelled, and asyncio.CancelledError has not been an Exception since
  Python 3.8. It raised straight back out and skipped the rest of its own
  teardown - the cloud connection stayed open, the watcher kept running, and
  the caller's shutdown was cancelled with it.
• start_proxy() read self.node.id to name a task, before the device has
  identified itself. Because it was only a name, the failure read as "failed
  to start MITM" and quietly fell back to local-only.

No change to this integration's own code. If you have passthrough switched on,
this is the version to be on.