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PreCommit Python Runners

Capture element timestamp in DoFnRunners so they do not access mutable fields #37402

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Capture element timestamp in DoFnRunners so they do not access mutable fields

Capture element timestamp in DoFnRunners so they do not access mutable fields #37402

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Summary
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- ${{ matrix.job_name }} (${{ matrix.job_phrase }} ${{ matrix.python_version }})
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- Usage
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