update slot resume pointers for step 7863

slots/18/latest.json

@@ -1 +1 @@
-{"worker_id": "slot:18", "checkpoint": "slots/18/checkpoint-7222", "step": 7222, "updated_at": 1776745121}
+{"worker_id": "slot:18", "checkpoint": "slots/18/checkpoint-7863", "step": 7863, "updated_at": 1776774404}