v1.6.3

Registers a coordinator listener when force_discharging or force_export turns
on. The listener fires on every soc_battery poll (~10 s) and reads the cutoff
SOC number entity dynamically. When soc_battery reaches or drops below the
cutoff, the switch is turned off and async_reset_dispatch is sent without
waiting for the next 50 s refresh cycle. The existing refresh loop remains
as a backup. The listener is cancelled on any turn-off path via _cancel_timer.