Cancel nordpool listener update timer on unload (#183304)

Co-authored-by: Claude <noreply@anthropic.com>

homeassistant/components/nordpool/coordinator.py

@@ -74,6 +74,14 @@ class NordPoolDataUpdateCoordinator(DataUpdateCoordinator[DeliveryPeriodsData]):
         )
         self.async_update_listeners()
 
+    @override
+    async def async_shutdown(self) -> None:
+        """Cancel the listener update timer and shut down the coordinator."""
+        if self.listener_unsub:
+            self.listener_unsub()
+            self.listener_unsub = None
+        await super().async_shutdown()
+
     @override
     async def _async_setup(self) -> None:
         """Set up the coordinator."""

tests/components/nordpool/test_init.py

@@ -40,9 +40,12 @@ async def test_unload_entry(hass: HomeAssistant, get_client: NordPoolClient) ->
     await hass.async_block_till_done(wait_background_tasks=True)
 
     assert entry.state is ConfigEntryState.LOADED
+    coordinator = entry.runtime_data
+    assert coordinator.listener_unsub is not None
     assert await hass.config_entries.async_unload(entry.entry_id)
     await hass.async_block_till_done()
     assert entry.state is ConfigEntryState.NOT_LOADED
+    assert coordinator.listener_unsub is None
 
 
 @pytest.mark.parametrize(