- Added SCHEDULED_SKIPS_FILE constant pointing to scheduled_skips.json
- Added _is_scheduled_skip_today() method: reads JSON list of YYYY-MM-DD
strings, exits 0 if today's UTC date is found (skips lock entirely)
- _shutdown.py: changed rtcwake -m no -> -m disk so machine hibernates
immediately when scheduling morning alarm (bedroom use)
- Added tests/test_scheduled_skip.py with full branch coverage
- Added scheduled_skips.json with initial skip dates