Review this commit like a senior engineer performing code review.

Commit Message:
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Files Changed:
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Stats:
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Diff:
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Return:

1. Review Findings:
- List actionable findings ordered by severity
- Include likely bugs, regressions, correctness risks, performance concerns, and maintainability issues
- If there are no significant findings, say so explicitly

2. Suggestions:
- Give concrete follow-up improvements or tests to add

3. Risk Level:
- Low / Medium / High with reasoning
