update slot resume pointers for step 490

slots/10/latest.json

@@ -1 +1 @@
-{"worker_id": "slot:10", "checkpoint": "slots/10/checkpoint-473", "step": 473, "updated_at": 1776387939}
+{"worker_id": "slot:10", "checkpoint": "slots/10/checkpoint-490", "step": 490, "updated_at": 1776388364}