fstio includes fstlib sources from fstpackage/fstcore commit
bea65ebdf1f74be42a1cf1c422d3aae79a97b982 (2025-02-07). The OpenMP helper is
replaced by fstio's single-threaded MPL-2.0 shim and is not vendored.

fstlib is Copyright (C) 2017-present Mark AJ Klik and is distributed under
the Mozilla Public License 2.0. Its source and license are present under
vendor/fstlib/.

fstlib bundles LZ4, Zstandard, and libdivsufsort-lite source code. Their
copyright notices and license texts are retained in vendor/fstlib/LZ4/,
vendor/fstlib/ZSTD/, and the individual source files.
