[python] Add compaction module with Ray distributed executor#7771

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TheR1sing3un wants to merge 12 commits intoapache:masterfrom

TheR1sing3un:feat/python-compaction-phase1-4

Commits on May 3, 2026

[python][compact] phase-1: extend commit protocol for compaction
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[python][compact] phase-1 fixup: round-trip non-JSON-native partition values
TheR1sing3un
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[python][compact] phase-2: append-only compaction with LocalExecutor
TheR1sing3un
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[python][compact] phase-2 fixup: address review findings
TheR1sing3un
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[python][compact] phase-3: primary-key LSM compaction with universal strategy
TheR1sing3un
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[python][compact] phase-3 fixup: address review findings
TheR1sing3un
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[python][compact] phase-4: Ray distributed executor
TheR1sing3un
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[python][compact] phase-4 fixup: address review findings
TheR1sing3un
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