- Add interval_minutes column to TaskSchedule interface
- Prefer interval_minutes over interval_hours when calculating next_run_at
- Add jitter (0-20% of interval) for sub-hour schedules to prevent detection
- Update getSchedules() to include interval_minutes and dispensary_name
- Update updateSchedule() to allow setting interval_minutes
- Add migration 121 for interval_minutes column
Part of Real-Time Inventory Tracking feature.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>