update slot resume pointers for step 2319

slots/16/latest.json

@@ -1 +1 @@
-{"worker_id": "slot:16", "checkpoint": "slots/16/checkpoint-737", "step": 737, "updated_at": 1776398157}
+{"worker_id": "slot:16", "checkpoint": "slots/16/checkpoint-2319", "step": 2319, "updated_at": 1776406313}