The alarm now also needs peakguard.load_too_high(): with the battery at
full power, the quarter still ends more than 10 W over the real limit.
The battery reading is the lower of this cycle's and the last, so a meter
sample from before the battery's last increase is not counted twice.
At most one alarm per quarter. Control outputs unchanged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
