chore(deps): bump actions/checkout from 4 to 6

[dependabot]

📦 Dependency Update: actions/checkout

Version Change

• Previous: 4
• New: 6
• Change Type: Major version bump

⚠️ Compatibility Analysis

⚠️ Breaking changes possible - Please review changelog and migration guide

Note: GitHub Actions checkout update - verify workflow compatibility.

🔧 Changes Required

• Dependency updated in package.json or workflow file
• Lock file updated (if applicable)
• Build verified: npm run build (for npm packages)
• Tests verified: npm run test:run (for npm packages)
• Linting verified: npm run lint (for npm packages)
• Workflow verified (for GitHub Actions)
• Affected functionality tested manually

✅ Verification Checklist

• Build succeeds: npm run build (for npm packages)
• All tests pass: npm run test:run (for npm packages)
• Linting passes: npm run lint (for npm packages)
• No TypeScript errors (for npm packages)
• Workflow runs successfully (for GitHub Actions)
• Affected functionality tested manually
• Breaking changes reviewed and addressed (if applicable)
• Migration guide reviewed (if applicable)

📝 Migration Notes

Please review the migration guide for this major version update and address any breaking changes.

🔗 Related

• Milestone: v1.3 - Quality & Polish
• Type: Maintenance / Dependency Update
• Priority: High
• Breaking: Yes

🚀 Status

⏳ Awaiting verification and testing

Note
Automatic rebases have been disabled on this pull request as it has been open for over 30 days.

[dependabot]

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