Update Tuya RCBO quirk power factor calculation for home-assistant/core#107641 (#2896)

Amend power_factor calculation to respect Zigbee cluster specification - required for release of ZHA fix:
home-assistant/core#107641

Author: jeverley

tests/test_tuya_rcbo.py

@@ -346,11 +346,11 @@ async def test_power_factor(zigpy_device_from_quirk):
         b"\x09\x07\x01\x02\x03g\x00\x00\x0c\x00\x09\xbf\x00\x09\xbf\x00\x00\x00\x00\x00\x00"
     )
     tuya_cluster.handle_message(hdr, args)  # active_power
-    assert tuya_listener.attribute_updates == [(0x050B, 2495), (0x0510, 1000)]
+    assert tuya_listener.attribute_updates == [(0x050B, 2495), (0x0510, 100)]
 
     tuya_listener.attribute_updates = []
     hdr, args = tuya_cluster.deserialize(
         b"\x09\x08\x01\x02\x03g\x00\x00\x0c\x00\x06\x4b\x00\x06\x4b\x00\x00\x00\x00\x00\x00"
     )
     tuya_cluster.handle_message(hdr, args)  # active_power
-    assert tuya_listener.attribute_updates == [(0x050B, 1611), (0x0510, 987)]
+    assert tuya_listener.attribute_updates == [(0x050B, 1611), (0x0510, 99)]

zhaquirks/tuya/ts0601_rcbo.py

@@ -248,10 +248,10 @@ def update_attribute(self, attr_name: str, value: Any) -> None:
         if attr_name == "active_power":
             apparent_power = self.get("apparent_power")
             if apparent_power:
-                power_factor = value / apparent_power * 1000
-                if power_factor > 1000:
-                    power_factor = 1000
-                super().update_attribute("power_factor", int(power_factor))
+                power_factor = value / apparent_power * 100
+                if power_factor > 100:
+                    power_factor = 100
+                super().update_attribute("power_factor", round(power_factor))
 
 
 class TuyaRCBODeviceTemperature(DeviceTemperature, TuyaAttributesCluster):