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To create the downscaling datasets, we do a bit of light processing to gather variables from various files and renaming of fields/coordinates. This PR formalizes that process into a script
scripts/downscaling/process_from_raw_zarrs.py. I used this to produce the +4K datasets undergs://vcm-ml-scratch/andrep/downscaling-xshield-amip-plus-4kthat now reside on weka under/climate-default/2026-02-23-X-SHiELD-AMIP-plus-4K-downscaling.For now, all the configuration is within the script, but if we do this for other data, we should probably split that out into YAML-based configs or something. The script allows for
--dry-runmode to preview writes, processing any combination of the dataset resolutions (100km, 25km, 3km), it allows for partial variable appends, and complete overwrites, but errors on output existence if no special zarr write mode is specified.