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* Python: Preserve OTel parent context for deferred streams - capture current OTel context when opening host-managed streaming runs - re-activate captured context during deferred stream pulls and finalization - add host-level regression coverage for deferred stream parent-span linkage - add Responses channel integration coverage for request parent span propagation Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> * Python: Capture OTel stream context before target.run - capture OTel context snapshot before invoking target.run in _invoke_stream - add regression test guarding capture-before-run evaluation order Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> --------- Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>