- engine: 5-field cron parser (*/n, ranges, lists) firing at most once
per minute; device-state triggers with edge detection; manual trigger
via POST /automation/rules/:id/trigger; actions run through the AI
pipeline so rules can call any tool (IoT control, search, ...)
- reminders: due-scan scheduler delivering via WebSocket broadcast,
optional LLM-polished reminder text with plain-title fallback;
Reminder gains Done flag with ListDue/MarkDone
- tests: cron matching and validation, once-per-minute dedup, device
edge triggering, manual trigger, reminder delivery