version 2.2.4
release v2.2.4: add prune_nexus.py, a NeXus file shrinking utility

Adds scripts/prune_nexus.py to gzip+shuffle-compress the event bank
datasets in a .nxs.h5 file (uncompressed by the DAQ and normally the
bulk of the file size), with an optional --prune/-P mode that also
drops HDF5 paths this file's scan type never reads during nxs2taco
conversion. Either mode verifies losslessness by reconverting the
result and diffing its output against a conversion of the original
before installing it. ChangeLog documented in a follow-up commit.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>