buildWinterForecast was indexing solarW[] and winterPrices[] by slot
position h instead of actual UTC hour. When a forecast starts at 18:00,
h=8 (02:00 AM) was getting solarW[8]=1200W, giving midnight slots a
false solar bonus in RuleBasedStrategy::slotScore(). The strategy
correctly chose those slots, but countSlotsInCheapestN (price-only)
reported them as outside the 6 cheapest hours → test 1 failed.
Fix: index both arrays by slot.start.toUTC().time().hour() so solar
peaks at noon and prices reflect the real time-of-day. All 11 tests pass.
Also includes the INCLUDEPATH += \$\$PWD fix in energyplugin.pri that
makes relative includes work for test builds consuming the .pri.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Patrick Schurig