On her first day as CEO of PepsiCo, Indra Nooyi fired her general counsel. Then rehired him before dinner. It wasn’t a stunt. It was a signal. She ran a $200 billion empire the same way she ran her life: with surgical precision, uncompromising standards, and an allergy to corporate theater. But here's what separates this conversation from every other CEO interview: she tells you what her massive…