[Python] Add PCollection.with_side_outputs for chainable side outputs - #38268

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Commits on Apr 22, 2026

Add PCollection side output accessors

Joey Tran
and
Copilot
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Register top-level PCollection side outputs

Joey Tran
and
Copilot
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Apply yapf formatting
Joey Tran
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Rename test helper to RemoveEvens and trim redundant tests
Joey Tran
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Commits on Jul 14, 2026

Merge remote-tracking branch 'upstream/master' into pr/pcollection-side-outputs-impl
hjtran
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