fix(msword): support inherited numPr and multi-level numbering markers

[wantbook-book]

Issue resolved by this Pull Request:

Resolves #2758

Description:

• Walk the paragraph style inheritance chain to resolve w:numPr when it is not directly on the paragraph.
• Parse numbering.xml to render multi-level markers based on lvlText/start/numFmt, instead of flattening to single-level counters.
• Add regression tests covering paragraph-level numbering and style-inherited numbering.
• Note: this changes list/heading markers to follow lvlText (e.g., %1.), so existing groundtruth like list_after_num_headers.docx may need updates.

Checklist:

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

Tests:

• pytest test_docx_numbering.py -q

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✅ DCO Check Passed

Thanks @wantbook-book, all your commits are properly signed off. 🎉

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Related Documentation

Checked 9 published document(s) in 1 knowledge base(s). No updates required.

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Codecov Report

❌ Patch coverage is 5.90909% with 207 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
docling/backend/msword_backend.py	5.90%	207 Missing ⚠️

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[ceberam]

Thanks @wantbook-book for suggesting this fix.
Could you please check the regression tests that are failing (basically, the test file tests/test_backend_msword.py)? It may be that the ground truth files need to be updated to reflect the new, correct conversion.