workflows: fix TOCTOU in write_json and make writes atomic for good measure#139
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…easure We were doing an `exists()` check but then doing the write afteward, but this meant there was a race condition window. Possibly we should be using sqlite?
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We were doing an
exists()check but then doing the write afteward,but this meant there was a race condition window.
Possibly we should be using sqlite?