🚑 Hotfix for v2.9.0
If you updated to v2.9.0 and your switches disappeared, this is the fix.
The new schedule switch called the base entity constructor with a missing argument, which aborted the entire switch platform setup — power, light, auto-light and ambilight switches were all missing. The schedule sensor and the new services were not affected.
Update and restart; all switches return, including the new Scheduled start arm switch.