Make CPAN random tester safe for parallel runs#863
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Serialize shared CPAN compatibility report updates with a lock, reload current state before each write, and atomically replace generated data/report files so parallel tester instances do not drop each other's results. Also isolate per-run logs under /tmp/cpan_random_logs/<Run-ID>/ and update the operator docs. Generated with Codex (https://openai.com/codex) Co-Authored-By: Codex <codex@openai.com>
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Summary
.datstate before each write, then atomically replace report files/tmp/cpan_random_logs/<Run-ID>/Testing
perl -c dev/tools/cpan_random_tester.plperl dev/tools/cpan_random_tester.pl --helpgit diff --checktimeout 1200 make > /tmp/make_cpan_random_parallel_safe.log 2>&1; printf 'EXIT: %s\n' $? >> /tmp/make_cpan_random_parallel_safe.log