On Windows, the downloaded ZIP file may remain locked by antivirus
software or Node.js file handle release delays. This causes
Expand-Archive to fail with "being used by another process" errors.
Added exponential backoff retry logic (5 attempts, 500ms-8s delays)
that detects file lock errors and retries the extraction. Non-lock
errors still fail immediately.
Fixes GH#889 (bd-5dlz)
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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