v0.4.25

• wet_routed_years() routes PCIC's per-year sub-basin days to segments, and wet_departure_carry() can weight donors by PCIC's modelled covariance (#122). scripts/departure_pcic.R found donors picked by that covariance carry departures best (median held-out NSE 0.72, against 0.67 for the nearest donors). PCIC's own per-year departures (0.48) and a blend of the two (0.71) do not ship (research/pcic_hydrology.md).