fix: align Jest devDependencies to v29, remove unused jest-environment-jsdom

[Copilot]

package.json had a split-version Jest setup: jest@^29 alongside jest-environment-jsdom@^30 and jest-util@^30, causing resolver/version skew in the lockfile.

Description

• Removed jest-environment-jsdom@^30.3.0 — never needed; jest config uses testEnvironment: 'node'
• Downgraded jest-util from ^30.3.0 → ^29.7.0 — required peer dep of ts-jest, now consistent with the rest of the Jest v29 stack (jest, @types/jest, ts-jest)

Before:

"jest": "^29.7.0",
"jest-environment-jsdom": "^30.3.0",
"jest-util": "^30.3.0",
"ts-jest": "^29.4.6"

After:

"jest": "^29.7.0",
"jest-util": "^29.7.0",
"ts-jest": "^29.4.6"

Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📝 Documentation update
• 🎨 Code style update (formatting, renaming)
• ♻️ Refactoring (no functional changes)
• ⚡ Performance improvement
• ✅ Test update

Related Issue

Testing Done

• Tested locally
• Added/updated tests
• All tests passing

Screenshots (if applicable)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published

Co-Authors

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Summary by cubic

Align Jest devDependencies to v29 and remove the unused jest-environment-jsdom. Set jest-util to ^29.7.0 to match jest@^29.7.0 and ts-jest@^29, keeping tests consistent.

^{Written for commit f1425cf. Summary will update on new commits.}