This week, "My Fair Lady": By most accounts, political consultant Sandra Polka is not the best qualified operative in the state, far from it. Says one source about her: "She doesn't have the talent, she doesn't have the charm, she doesn't have the ability." And yet Polka, who until six years ago was bankrupt and living in obscurity, is now one of California's most powerful political fixers. Howcum? She got hooked up with State Senate president pro tem Don Perata, that's howcum. Staff writer Bob Gammon takes a cold, hard look at Sandi Polka and her boss, and the political careers they've made and broken. If it looks like something out of The Godfather, you're right.