test: retry temp-repo cleanup to absorb git auto-gc races - #17
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The temp-repo cleanup in afterEach races git's detached auto-maintenance:
git commitcan leave a background process touching.gitwhilefs.rmwalks it, which surfaced as a transientENOTEMPTY: directory not empty, rmdir '.../.git'on the PR #16 self-test run. AddmaxRetries/retryDelayto the recursive rm (Node retries ENOTEMPTY/EBUSY/EPERM) in both test files.