Separate DHW and Space heat monitoring

@Zapaman Yes, agreed the SH vs DHW monitoring is a really useful feature.

However, I’m using the Daikin SH/DHW flag, which is great, apart from the legionella cycle, where it switches back to SH when the HP has done, leaving the Booster Heater (BSH) on to complete the rise to 60C! This causes the BSH kWh to be allocated to SH, not DHW. Overall, it doesn’t matter, since kWh are kWh, but it does hammer the SH COP. My electrical monitoring is on the whole system (HP, BUH & BSH) rather than individually, which does make sense generally.