Add helper to check for device initializtion instead of first status

custom_components/oasis_mini/pyoasiscontrol/device.py

@@ -155,6 +155,11 @@ class OasisDevice:
         if value:
             self.brightness_on = value
 
+    @property
+    def is_initialized(self) -> bool:
+        """Return `True` if the device is fully identified."""
+        return bool(self.serial_number and self.mac_address and self.software_version)
+
     @property
     def is_sleeping(self) -> bool:
         """