Task 423: Fix stats-refresh to Update Body Text References

Status: DONE

Summary

The stats-refresh.ts script updates the stats table and bulleted list entries, but misses body text references like Nのユニットテストで正確性を保証しています. This causes test failures when Rust test count changes.

Rationale

• Consistency between stats table and body text is validated by tests (article-content-validation.test.ts:87)
• Manual body text fixes create maintenance burden
• All stat references should be updated atomically