Improvements and fixes

A faulty irradiation sensor no longer triggers false inverter outages, and a plant's total feed-in energy is no longer missing after an inverter replacement or a restart of the on-site data collection.

• A daylight reading an irradiation sensor cannot physically deliver is now refused, and inverters are no longer declared in outage against it.
• A plant's total feed-in energy is published again after an inverter has been replaced, or after the on-site data collection restarted.