v2.1.0

Added

• Optional lossless zlib compression of netCDF4 output: --compress / --complevel flags (on get and convert) and compress/complevel params on the conversion functions. Off by default (HDF5 per-variable overhead makes it pay off only for long profiles; crossover ≈ 1000 levels).
• .zenodo.json + author ORCID in CITATION.cff for a citable Zenodo DOI.

See CHANGELOG.md.