EVerest has race-condition-induced std::map corruption in OCPP 1.6 evse_soc_map

EVerest is an EV charging software stack. Versions prior to 2026.02.0 have a data race leading to `std::map<std::optional>` concurrent access (container/optional corruption possible). The trigger is EV SoC update with powermeter periodic update and unplugging/SessionFinished status. Version 2026.02.0 patches the issue.