ENH: Dedicate populate-externaldata-cache workflow for CI prefetch
ENH: Cache ExternalData object store across CI runs
ENH: Regression test for issue #871 filter-initialization path
ENH: Add DECL_PYTHON_VARLEN_SEQ_TYPEMAP regression test
STYLE: Extend DECL_PYTHON_VARLEN_SEQ_TYPEMAP signature
BUG: DECL_PYTHON_VARLEN_SEQ_TYPEMAP drops native ITK array input
ENH: Automatic GitHub Actions cache cleanup for closed/merged PRs
ENH: Deprecate in-tree OpenCL GPU modules for removal in ITK 6 (#6075)