Powerworld PW59410: COP needs scaling

Issue #1530

custom_components/tuya_local/devices/powerworld_pw58410_waterheater.yaml

@@ -570,6 +570,7 @@ secondary_entities:
                    000000000000000000000000000000000000000000000000\
                    000000000000000000000000000000000000000000000000\
                    0000000000000000"
+            scale: 10
   - entity: number
     name: Pump speed
     category: config