* Initial groundwork for entity cleanup on node removal * Connect node_removed to dispatcher * update docstring * Add node_removal test * Address review comments * Use hass.add_job instead of run_coroutine_threadsafe
* Initial groundwork for entity cleanup on node removal * Connect node_removed to dispatcher * update docstring * Add node_removal test * Address review comments * Use hass.add_job instead of run_coroutine_threadsafe