GH-43695: [C++][Parquet] flatbuffers metadata experiments - #43793

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alkis wants to merge 10 commits into

apache:mainfrom

Commits on Nov 26, 2025

1/n flatbuf footer
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2/n remove deprecated ColumnChunk.file_offset
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3/n optimize statistics
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4/n optimize offsets, num_values, and byte counts
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5/n if column chunk is dense do not encode num_values
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6/n remove encoding_stats
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7/n remove path_in_schema
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8/n remove encodings
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9/n optimize statistics take 2
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Commits on Nov 27, 2025

Update to latest flatbuf definition. Store 64-bit offsets and lengths instead of relative ones. Implement Geo types. Add Float16 and Variant. Pack statistics better
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178bc90