v0.9.1 — Honest household consumption

Analysing a 10-day holiday, with nobody home, showed the inverter's household_load_power is wrong in both directions:

• It counts battery charging as household load. At 02:00 it reported 1536 W while the battery drew 4937 W — inflating the metered daily figure by ~1.7 kWh on every charging day.
• It cannot see the AC-coupled solar, which is on a separate inverter, so through the middle of the day it reports load net of solar. The raw profile bottomed out at 13:00 at 58 W — not less use, just solar covering it.

Both errors fed self_sufficiency_today and the effective unit rate, which divided cost by that figure.

New house_energy_today/_yesterday derive consumption from metered flows instead — what the battery and solar delivered, plus what the grid delivered that did not go into the battery. The ratios and the energy table's Home load now use them. The lifetime column keeps the inverter total, which reads high, because there is no clean alternative.

Reference figures from that holiday: base load 273 W, total 8.24 kWh/day, against 13.9 kWh/day the ten days before.

module_url is ?v=0.9.1.