0.1.2b3

Feature: Prediction sensor

The Electricity consumption EKZ {id} prediction sensor now fills the recent gap caused by EKZ's ~7–10 day data delay.

How it works:

• During historical import (catch-up), hourly averages are accumulated per UTC month+hour from the raw 15-min slots
• Once fully caught up, each update cycle generates hourly predicted consumption from the last known real data point until now
• Statistics are written to sensor.electricity_consumption_ekz_{id}_prediction
• Add both the real sensor and the prediction sensor to the HA Energy Dashboard

Also fixed:

• Statistic ID now correctly matches the entity ID (was _predictions with trailing s, now _prediction)