perf: use docling-parse-v4 as default

[dolfim-ibm]

Checklist:

• Documentation has been updated, if necessary.
• Examples have been added, if necessary.
• Tests have been added, if necessary.

[dosubot]

Documentation Updates

Checked 3 published document(s). No updates required.

^{How did I do? Any feedback?}  

[mergify]

Merge Protections

Your pull request matches the following merge protections and will not be merged until they are valid.

🟢 Enforce conventional commit

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Make sure that we follow https://www.conventionalcommits.org/en/v1.0.0/

• title ~= ^(fix|feat|docs|style|refactor|perf|test|build|ci|chore|revert)(?:\(.+\))?(!)?:

[github-actions]

✅ DCO Check Passed

Thanks @dolfim-ibm, all your commits are properly signed off. 🎉

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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