splitIso reached the time by taking characters 11..16, so "2026-06-11T01:11 PM"
became 01:11. The hour survived and the half of the day did not, which is why
AM and 24-hour times in the same document imported correctly. The arrival then
sorted before the departure and the router rolled it onto the next day, so a
three-hour hop was rendered as an overnight.
The client has done this properly since #1725; this is the server half, which
was never pulled across. normalizeLocalDateTime rewrites a value only when it
actually finds a meridiem, so a date-only value, a value carrying an offset and
anything the parser does not know come back byte for byte.
The mapper has only two exits for a date, toIsoString and splitIso, so this
covers all eight types and every emitted field at once. It also stops
sameConnection comparing a NaN timestamp, which silently merged unrelated legs
into one booking.
Maurice