Release v2.1.7

[igerber]

Summary

• Bump version to 2.1.7
• Add CHANGELOG entry for v2.1.7 release

Changes in v2.1.7

Fixed

• plot_event_study reference period normalization behavior
  • Effects are now only normalized when reference_period is explicitly provided
  • Auto-inferred reference periods only apply hollow marker styling (no normalization)
  • Reference period SE is set to NaN during normalization (constraint, not estimate)
  • Updated docstring to clarify explicit vs auto-inferred behavior

Changed

• Refactored visualization tests to reuse cs_results fixture for better performance

Methodology references

• N/A - version bump only, methodology changes were in PR Fix plot_event_study reference_period normalization #108

Validation

• Tests added/updated: No test changes (test refactor was in PR Fix plot_event_study reference_period normalization #108)
• All 22 visualization tests pass

Security / privacy

• Confirm no secrets/PII in this PR: Yes

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[github-actions]

Overall Assessment

• ✅ Looks good

Executive Summary

• Metadata-only release: version bumps and changelog entry.
• No estimator or inference logic changes; methodology registry checks not triggered.
• No runtime code or tests changed in this PR.

Methodology

• No findings.

Code Quality

• No findings.

Performance

• No findings.

Maintainability

• No findings.

Tech Debt

• No findings.

Security

• No findings.

Documentation/Tests

• No findings. Residual risk: metadata-only changes; no tests updated or required for this PR.