Several tests of one binary write entries of the same sidecar (three of
them write tests/vectors/int_video/sha256.json), each by reading the file,
inserting its entry and writing it back. Under parallel test threads two
writes could interleave and drop an entry. Each write now holds a
process-wide lock. The support module documents the command that
regenerates the sidecars under tests/vectors/ and neural-conformance/.
Regenerated with that command locally, every sidecar came out byte for
byte as committed, and the same tests then passed in check mode.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
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