Release v2.1.8

[igerber]

Summary

• Bump version to 2.1.8 in __init__.py, pyproject.toml, rust/Cargo.toml
• Add CHANGELOG.md entry documenting v2.1.8 changes:
  • /push-pr-update skill for PR revisions
  • TROP methodology alignment fixes (PR Align TROP with paper methodology (Equation 5, D matrix semantics) #110)
  • /submit-pr skill improvements (PR Add /push-pr-update skill for pushing PR revisions #111)
• Clear tutorial 10 notebook outputs after validation

Methodology references (required if estimator / math changes)

• Method name(s): N/A - version bump only, no methodology changes
• Paper / source link(s): N/A
• Any intentional deviations from the source (and why): None

Validation

• Tests added/updated: No test changes (version bump only)
• Backtest / simulation / notebook evidence (if applicable): Tutorial 10 validated and outputs cleared

Security / privacy

• Confirm no secrets/PII in this PR: Yes

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Generated with Claude Code

[github-actions]

Methodology

• Severity: P3 | Impact: None | Concrete fix: None (no estimator/math/SE/default changes in this diff; Methodology Registry consulted)

Code Quality

• Severity: P3 | Impact: None | Concrete fix: None (metadata-only edits; no functional code paths changed)

Performance

• Severity: P3 | Impact: None | Concrete fix: None (no runtime logic changes)

Maintainability

• Severity: P3 | Impact: None | Concrete fix: None (no API or structure changes)

Tech Debt

• Severity: P3 | Impact: None | Concrete fix: None (no new debt introduced)

Security

• Severity: P3 | Impact: None | Concrete fix: None (no auth/secrets-related changes in diff)

Documentation/Tests

• Severity: P3 | Impact: None | Concrete fix: None (changelog update + tutorial output cleanup only; no test updates needed)

Open Questions / Assumptions

• None.

Overall Assessment

• ✅ Looks good

Executive Summary

• Release metadata updates only; no estimator, inference, or default-behavior changes detected.
• Tutorial notebook output cleanup appears formatting-only and does not alter code execution.
• No additional tests warranted for a version/changelog-only release.