v0.1.6

Changes

• restart_aio waits for topology EVDC offline (device/devicetreepanel/topology deviceStatus / communicateStatus) before power-on
• Plant is never left powered off (EVDC offline wait is best-effort with timeout)
• Topology helpers: device_topology, topology_evdc_status, offline maps
• Unit tests for topology offline helpers

Required by homeassistant-sigenergy-cloud 0.1.6.