Felnin Celesten’s current 15-game hitting streak at High-A Everett has been loud enough to cut through a crowded Mariners farm-system conversation. Over that stretch, the 20-year-old switch-hitting shortstop is slashing .466/.529/.690 with a 1.219 OPS, 27 hits, five doubles, one triple, two home runs, 21 runs, 14 RBI, eight walks and four stolen bases. Celesten is grabbing the conversation by the collar and reminding everyone why he was such an exciting name in the first place. While Colt Emerson has become the big-picture infield headliner. Kade Anderson and Ryan Sloan have brought premium pitching buzz. And Lazaro Montes still carries the massive-power fascination. Celesten was still there. He just was not always the first name mentioned. Through his first 28 games with Everett, Celesten is hitting .330/.421/.500 with a .921 OPS, 35 hits, seven doubles, one triple, three home runs, 25 runs, 23 RBI, 17 walks and seven stolen bases. Again, this is High-A.…