[C++][Parquet] Fix ParquetFilePrinter to produce valid JSON for statistics #47189

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[C++][Parquet] Fix ParquetFilePrinter to produce valid JSON for statistics#47189

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Component: C++Component: ParquetType: bug

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on Jul 25, 2025

Describe the bug, including details regarding any error messages, version, and platform.

ParquetFilePrinter uses FormatStatValue to print min/max stats. If stats contain non-UTF8 data, produced JSON is invalid.

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C++, Parquet

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wgtmac

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Component: C++Component: ParquetType: bug

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