I’m not a TV buff. OK, I binge-watched “Breaking Bad” for two months last year. I intend to DVR the two-night premiere of its new prequel, “Better Call Saul,” next week. Why plug “Saul” in a column about legal careers? It’s no secret that this prequel will delve into Saul’s life story. Over the years, Bob Odenkirk’s character has had a rocky relationship with his brother, Chuck. While street lawyer Saul hustles for every retainer, name partner Chuck seemingly …