[train] Add `worker_process_setup_hook` to set mp start method to `spawn`#1333

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SumanthRH merged 3 commits intomainfrom

Mar 17, 2026

Commits on Mar 17, 2026

[utils] Add worker_process_setup_hook to set mp start method to spawn

SumanthRH
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claude
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[utils] Move mp spawn comment to worker_setup, remove from main_base

SumanthRH
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claude
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[utils] Call worker_setup_fn in main_base for driver process spawn setting

SumanthRH
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claude
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