Two boot migrations. The first appends the missing dated days to a trip
the old 365-day cap clipped, only where the dated days still run unbroken
from the start date, so a trip that was re-dated by hand or lost a day in
the middle is left alone; dateless days that hold content stay behind the
dated ones as generateDays keeps them. The second rebuilds
roadtrip_day_boundaries without the CHECK that held day_number to 366,
which would have refused a boundary on a later day of a longer trip.
The road-trip contracts follow the same limit: the day boundary and
corridor schemas, the set_day_boundary tool and the day window's runaway
guard read MAX_TRIP_DAYS instead of their own 365 or 366, and the
tooLong message carries the number as a placeholder in all 23 locales.
Maurice