Fix romanize() returning empty string / literal `<PAD>` for thai2rom engines - #1351

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wannaphong with Copilot wants to merge 3 commits into

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copilot/fix-romanize-empty-string

Commits on Mar 21, 2026

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Copilot
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Fix romanize() returning empty/wrong string for thai2rom and thai2rom_onnx

Copilot
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wannaphong
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Extend TransliterateONNXTestCaseN in testn_tokenize_onnx.py with comprehensive test cases

Copilot
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bact
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