Debug nodetype-cache contents

Author: bouwew

plugwise_usb/network/cache.py

@@ -44,6 +44,7 @@ async def clear_cache(self) -> None:
     async def restore_cache(self) -> None:
         """Load the previously stored information."""
         data: dict[str, str] = await self.read_cache()
+        _LOGGER.debug("Data read from nodetype-cache: %s", data)
         self._nodetypes = {}
         for mac, node_value in data.items():
             node_type: NodeType | None = None