Work out shift pay across the autumn clock change with breaks, night premium, weekly overtime and a holiday

# Work out shift pay across the autumn clock change, with breaks, night premium, weekly overtime and a holiday Inputs: `shifts.csv` (employee, start_local, end_local, break_min), `rates.json` (base hourly rate per employee) and `holidays.json`. Times are local wall-clock times in America/New_York (the clocks went back from 02:00 to 01:00 on 2026-11-01). Everything is synthetic. These rules are the record; where `payroll-note.txt` disagrees, the rules win. Rules: - A shift's span is the real elapsed time between start_local and end_local, converted with the time zone's rules (not the difference of the clock readings). - Unpaid break: break_min, but at least 30 minutes when the span is more than 6 hours. The break comes off the end of the shift: the last break minutes of the span are not worked. - Classify each worked minute by the local wall-clock time at that real minute: night when the local hour is 22, 23 or 0-5; holiday when the local date is in holidays.json. - Weekly overtime: a shift belongs to the pay week (Monday to Sunday) of its start date. Worked minutes beyond 2400 in a pay week are overtime, taken from the chronologically last worked minutes of that week. - Pay per minute at base/60 × multiplier: 1 normally, 1.5 for overtime, 2 for holiday minutes (the higher multiplier applies, never both), plus a night premium of 0.25 × base/60 for every night minute on top. Gross is rounded half-up to the cent per employee. - Write `out/pay.json`: `{"<employee>": {"worked_hours": <h>, "overtime_hours": <h>, "night_hours": <h>, "holiday_hours": <h>, "gross": <dollars>}, ...}` with hours = minutes / 60 rounded half-up to 0.01. ## How this run works - Work on your own: nobody will answer questions in this task, and writing to `ask/` counts against the run. - Write only under `out/`. Create `out/` if it is missing. Inputs are synthetic; don't fetch anything from the network. - Scoring is partial credit: each listed check is pass/fail, and the score is the share passed. Numbers are compared to within 0.005 unless the task says otherwise.