
BioSIM monthly + wind pull for one batch of locations, formatted to climate-only rows
dot-fetch_clim_monthly_batch.RdInternal worker shared by get_clim_monthly() (per-study-area cache) and the global per-cell cache in
prep_monthly_weather_biosim(). Returns ONLY climate columns keyed by CellID (no EcoID/BatchID):
ecoregion membership is study-area-specific and is applied later, at assemble time.