Implement high-performance sorted writing support in IcebergIO#38406

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atognolag:feature/sorted-icebergIO

Commits on May 7, 2026

Implement high-performance sorted writing support in IcebergIO
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Fix multiple-iteration anti-pattern in WriteGroupedRowsToFiles by extracting Schema from Coder
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Refactor row sorting calls to be explicitly conditional on table.sortOrder().isSorted() for readability
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Simplify sorting logic to keep call DRY and use straightforward 'rows' variable name
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Rename variable rows to sortedOrUnsortedRows to explicitly communicate its conditional state
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Fix sorted write PR comments: resolve null-ordering bugs and optimize key encoding performance
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Fix Checkstyle check MissingDeprecated warning in IcebergRowSorter.java
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Remove unused deprecated encodeSortKey method in IcebergRowSorter.java
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Commits on May 8, 2026

Commits on May 9, 2026

Adding a note and a warning
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Commits on May 12, 2026

Adding scratch files
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