[BEAM-3759] Add support for PaneInfo descriptor in Python SDK - ASF JIRA

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Details

Type: Improvement
Status: Open
Priority: P3
Resolution: Unresolved
Affects Version/s: 2.3.0
Fix Version/s: 2.19.0
Component/s: sdk-py-core
Labels:
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Description

The PaneInfo descriptor allows a user to determine which particular triggering emitted a value. This allows the user to differentiate between speculative (early), on-time (at end of window) and late value emissions coming out of a GroupByKey. We should add support for this feature in the Python SDK.