[I] Support transformed sort orders (bucket / truncate / etc.) [datafusion-comet]

["parthchandra (via GitHub)" <gi...@apache.org>]

parthchandra opened a new issue, #5339:
URL: https://github.com/apache/datafusion-comet/issues/5339

   ### What is the problem the feature request solves?
   
   Follow up for #5323
   
   We only report plain-column (identity) sort orders right now. Iceberg also allows sort orders on a transform of a column — bucket, truncate, year/month/day/hour, void. To use these we'd recompute the same transform and compare on it, matching Iceberg's per-type comparison exactly (including quirks like UUID ordering).
   
     This is more surface and more correctness risk, so it should come with per-type fuzz checks against Iceberg's own comparators before we report these orderings.
   
   
   ### Describe the potential solution
   
   _No response_
   
   ### Additional context
   
   _No response_


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