Add solar surplus car charging to divert excess PV to EV#3791

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Pezmc wants to merge 15 commits intospringfall2008:mainfrom

Pezmc:feature/car-charging-solar-surplus

Commits on Apr 17, 2026

Fix surplus detection running per-inverter and match sensor attribute shape

Pezmc
and
claude
committed

Commits on Apr 19, 2026

Reset _car_surplus_prev in reset() and drop getattr fallback
Pezmc
committed