docs(shadow): Add shadow lesson logs from #4832#4885
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Pull request overview
This PR adds a new Shadow lesson log research note documenting an incident involving stale Git locks that blocked git fetch in a worktree, extracted from PR #4832.
Changes:
- Add a new Shadow lesson log entry describing the stale lock incident, analysis, and resulting action items.
markdownlint flagged 6 list lines with '* + 3 spaces' indent; rule MD030 expects 1 space. Lines 17-19 (Implications list) + 25-27 (Action Items list) fixed. Resolves Copilot P0 review threads.
This was referenced May 25, 2026
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This PR extracts the shadow lesson logs from PR #4832. This is a decomposition of the blob PR #4832.