[Bee]TF accurate model not working as expected on borderless tables

### Bug
Cell structure issues are observed with some borderless tables in PoC documents.

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### Steps to reproduce
Run the following files trough latest TF accurate.
XS1741944083_BNP.Paribas.Issuance.B.V._Final.Pricing.supplement.pdf
XS2087676156_Citigroup Global Markets Europe AG_Final Pricing supplement.pdf
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### Docling version
TF accurate
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### Python version
3.11
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