On Windows CI, os.tmpdir() returns 8.3 short paths (C:\Users\RUNNER~1)
while git returns long paths (C:\Users\runneradmin). fs.realpathSync()
doesn't resolve DOS 8.3 names on NTFS — fs.realpathSync.native() does.
Added normalizePath() helper using realpathSync.native with fallback,
applied to all temp dir creation and path comparisons in the linked
worktree test suite.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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