update slot resume pointers for step 490

slots/3/latest.json

@@ -1 +1 @@
-{"worker_id": "slot:3", "checkpoint": "slots/3/checkpoint-363", "step": 363, "updated_at": 1776358268}
+{"worker_id": "slot:3", "checkpoint": "slots/3/checkpoint-490", "step": 490, "updated_at": 1776388027}