[PR] [CORE] Support key-grouped columnar shuffle [gluten]

["minni31 (via GitHub)" <gi...@apache.org>]

minni31 opened a new pull request, #13171:
URL: https://github.com/apache/gluten/pull/13171

   ## What changes are proposed in this pull request?
   
   This PR enables native key-grouped columnar shuffle for the Velox backend when Spark's partition metadata can be mapped safely.
   
   - Add Spark-version shims for key-grouped shuffle metadata across Spark 3.4 through 4.2.
   - Compute partition IDs on the JVM and prepend a temporary PID column for the existing native range-shuffle path.
   - Preserve vanilla Spark shuffle for ClickHouse, Bolt, and duplicate or partially clustered partition metadata.
   - Keep unknown-key routing compatible with the active Spark runtime, including content-based binary-key hashing.
   - Add focused Spark 4.0/4.1 integration coverage and a deterministic binary fallback-hash regression.
   
   This supersedes #12084 and addresses its review concern that partially clustered or duplicated partition values could make the advertised partition count diverge from the routing map.
   
   ## How was this patch tested?
   
   - `./dev/format-scala-code.sh apply`
   - `git diff --check`
   - License headers validated for all changed files with `.github/workflows/util/license-header.py`
   - Added Spark 4.0/4.1 key-grouped partitioning regressions and `ExecUtilSuite`
   
   The project build and test suites were not run locally; this draft is pending CI and external validation.
   
   ## Was this patch authored or co-authored using generative AI tooling?
   
   Generated-by: GitHub Copilot CLI 1.0.86
   


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Re: [PR] [CORE] Support key-grouped columnar shuffle [gluten]

["github-actions[bot] (via GitHub)" <gi...@apache.org>]

github-actions[bot] commented on PR #13171:
URL: https://github.com/apache/gluten/pull/13171#issuecomment-5927163875

   Run Gluten Clickhouse CI on x86


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