ArWen 2.2.1

ArWen 2.2.1 fixes the ERA5 route for everyone it broke: the one-file config that gpuwm domain --source era5 writes now loads in every entry point, so the documented chain from wizard to rendered PNGs runs again from a fresh install.

Fixed

• The config gpuwm domain --source era5 writes is accepted everywhere a config loads: gpuwm check, gpuwm run, gpuwm fetch and the ERA5 initialization front door all consume [case_data] instead of refusing the file it sits in.
• Big-domain ERA5 preparation no longer refuses the cache it just wrote; domains of 448x448 and larger prepare again.
• The composed Thompson + Shin-Hong profile no longer stops with a non-finite TKE error on real forecast cases. When its diagnostic-only TKE chain hits a legitimate zero, the value is repaired to the scheme's own floor and the run prints a one-line advisory and continues; that line is expected, not a problem to report.
• An ERA5 series that starts before the experiment start hour is trimmed with a message instead of refused.
• The fetch cache stores one copy of each downloaded object instead of two, cutting its disk use by 25 percent.
• gpuwm doctor recommends the CUDA library wheels that match the CUDA major your box actually serves, and a new check tells a missing CUDA header tree apart from a broken CuPy install and prints the remedy that fixes it.
• Releases publish more reliably.

Known issues

• The HRRR native route does not expose [tiles].
• [tiles] streaming currently starts only on Linux; on Windows the memory planner refuses before the configured budget is read.
• The ERA5 config route and gpuwm downscale do not expose [tiles].

Full detail in CHANGELOG.md.