update slot resume pointers for step 473

slots/10/latest.json

@@ -1 +1 @@
-{"worker_id": "slot:10", "checkpoint": "slots/10/checkpoint-399", "step": 399, "updated_at": 1776360389}
+{"worker_id": "slot:10", "checkpoint": "slots/10/checkpoint-473", "step": 473, "updated_at": 1776387939}