docs: update CHANGELOG.md for 0.4.2

[jorben]

Auto-generated changelog update for release 0.4.2.
Comparing changes from 0.4.1 to 0.4.2.

This PR was automatically created by the changelog workflow.

[github-actions]

AI Code Review Summary

PR: #60 (docs: update CHANGELOG.md for 0.4.2)
Preferred language: English

Overall Assessment

No blocking issue was detected in the reviewed diff; keep focused regression testing before merge.

Major Findings by Severity

No major issues identified from the reviewed diff.

Actionable Suggestions

• Address the highest severity findings first and add targeted tests for changed logic.

Potential Risks

• Potential hidden risks remain in edge cases not covered by the current diff context.

Test Suggestions

• Add happy-path + boundary + failure-path tests for touched modules.

File-Level Coverage Notes

No file-level notes.

Inline Downgraded Items (processed but not inline)

• None

Coverage Status

• Target files: 0
• Covered files: 0
• Uncovered files: 0
• No-patch/binary covered as file-level: 0
• Findings with unknown confidence (N/A): 0

Uncovered list:

• None

No-patch covered list:

• None

Runtime/Budget

• Rounds used: 0/4
• Planned batches: 0
• Executed batches: 0
• Sub-agent runs: 0
• Planner calls: 0
• Reviewer calls: 0
• Model calls: 0/64
• Structured-output summary-only degradation: NO

[github-actions]

Automated PR review completed.

• Findings kept: 0
• Findings with unknown confidence: 0
• Inline comments attempted: 0
• Target files: 0
• Covered files: 0
• Uncovered files: 0
  See the summary comment for detailed analysis and coverage details.