Add parquet export to simplify training with X-Mobility#22

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jaybdub wants to merge 7 commits intomainfrom

dev-parquet-export

Commits on Mar 17, 2025

add parquet export example
jaybdub
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Commits on Mar 25, 2025

fix segmentation overwrite issue
jaybdub
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Commits on Mar 31, 2025

update changelog and readme
jaybdub
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