Merge branch 'clh' into liuyang

LAPTOP-T815PCOQ\25526

2025-01-11 b9c47379d8ab2c2857b2b728ae4229c2a15c7f22

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#pragma once
 
class IObservable
{
public:
    virtual IObservable * observeOn(DWORD dwThreadId) = 0;
    virtual IObservable * subscribe(IObserver *pObserver) = 0;
    virtual IObservable * unsubscribe() = 0;
};