[Drain] OnTimer - propagate caused by drain bit up to DoFnRunner#37012

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stankiewicz:ontimer_propagate_causedByDrain

Commits on Dec 5, 2025

[Drain] Propagate drain information to timerData and TImer data structures. mostly noop.
stankiewicz
committed
add causedByDrain to DoFnRunner.onTimer interface and all implementations. Mostly passthrough.
stankiewicz
committed