It wasn’t all that long ago — Feb. 15, to be exact — that to any reasonable eye Brooks Koepka looked cashed. Cooked. Washed. Pick your synonym for “finished,” and it fit. Feb. 15 marked the debut of “Full Swing,” the Netflix series following a dozen of the world’s finest golfers. Koepka had won more majors than almost all of them, but sure didn’t seem to belong in their number. Broken, lost, staring at a vast empty shelf in his home reserved for a trophy that looked like it would never come, Koepka’s story was deemed so depressing that the Netflix producers moved it from first to second in the order.