Update TWFE review status in summary table

[igerber]

Summary

• Sync METHODOLOGY_REVIEW.md summary table to show TwoWayFixedEffects as Complete (2026-02-08), matching the detailed section below

Methodology references (required if estimator / math changes)

• N/A — documentation-only change, no methodology code modified

Validation

• Tests added/updated: No test changes
• Backtest / simulation / notebook evidence (if applicable): N/A

Security / privacy

• Confirm no secrets/PII in this PR: Yes

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Generated with Claude Code

[github-actions]

Overall assessment: ✅ Looks good

Executive summary:

• Doc-only change updates TWFE review status/date in the summary table.
• Summary table now matches the detailed TwoWayFixedEffects review entry.
• No estimator logic, assumptions, or inference paths changed; no tests required.

Methodology

• Severity: P3 | Impact: Documentation status sync only; summary row now aligns with detailed TWFE review and registry remains unchanged. Fix: None. (METHODOLOGY_REVIEW.md:L21-L26, METHODOLOGY_REVIEW.md:L149-L157, docs/methodology/REGISTRY.md:L213-L271)

Code Quality

• Severity: P3 | Impact: No code changes in this PR. Fix: None.

Performance

• Severity: P3 | Impact: No runtime impact (documentation-only). Fix: None.

Maintainability

• Severity: P3 | Impact: Improves consistency between summary and detailed review notes. Fix: None. (METHODOLOGY_REVIEW.md:L21-L26, METHODOLOGY_REVIEW.md:L149-L157)

Tech Debt

• Severity: P3 | Impact: No new debt introduced. Fix: None.

Security

• Severity: P3 | Impact: No code or config changes; no secrets risk. Fix: None.

Documentation/Tests

• Severity: P3 | Impact: Documentation updated; tests unchanged and not required for this scope. Fix: None.