update slot resume pointers for step 3603

slots/12/latest.json

@@ -1 +1 @@
-{"worker_id": "slot:12", "checkpoint": "slots/12/checkpoint-2755", "step": 2755, "updated_at": 1776687255}
+{"worker_id": "slot:12", "checkpoint": "slots/12/checkpoint-3603", "step": 3603, "updated_at": 1776690455}