[parquet] Use MICROS annotation for TIMESTAMP(n<=3) columns (Iceberg v2 compatibility)#8230

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q8webmaster:fix/parquet-timestamp-millis-to-micros

Commits on Jun 14, 2026

[parquet] use MICROS annotation for TIMESTAMP(n<=3) columns (Iceberg v2 compatibility)
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[parquet] fix TIMESTAMP(n<=3) footer stats decoded as millis instead of micros
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[parquet] fix lazy dictionary decoding for TIMESTAMP(n<=3) columns
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[parquet] fix TIMESTAMP(n<=3) Parquet row-group filter uses epoch_ms vs epoch_µs
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[parquet] remove over-long comment that broke Spotless line-length check
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