ferry date, ferry_routes docs, vessel coordinate parity
Correctness fixes to the ferry trip-date default, vessel-location coordinate rendering, and the wsdot_get_ferry_routes documentation.
Fixed:
- Ferry default trip date tracks the Washington/Pacific service date (
America/Los_Angeles), not the UTC date that rolled to the next day in the Pacific evening (#16) wsdot_get_vessel_locationscontent[]renders coordinates at full precision, matchingstructuredContent(#21)wsdot_get_ferry_routesdocs corrected to its real output — route ID, abbreviation, description (not terminal ID pairs / crossing times) (#19)
245 tests pass; bun run devcheck clean.