[Issue #1277] Integrate S3QS storage backend with coordinator-managed partitioned shuffle execution - #1353

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vladaliii:Issue_1277

Commits on Jul 27, 2026

[Issue #1277] Add shuffle metadata carrier structure in the planner layer.
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[Issue #1277] Add optional s3qs shuffle planner configuration switches and worker initialization bridging.
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[Issue #1277] S3QS Responsibility Cleanup
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[Issue #1277] Rewrite S3QSMessage and corresponding poll() to structured shuffle message
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[Issue #1277] Producer-side S3QS shuffle now writes through the runtime protocol
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[Issue #1277] The consumer-side S3QS shuffle now polls via the runtime protocol.
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[Issue #1277] Add PartitionedJoinS3QSOperator and s3qs ExchangeMethod
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[Issue #1277] align S3QS producer tasks with coordinator task ids
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[Issue #1277] coordinate S3QS stage workers
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[Issue #1277] move S3QS worker capacity control to coordinator
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[Issue #1277] wire coordinated S3QS query execution
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[Issue #1277] stabilize coordinated S3QS shuffle lifecycle
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