update slot resume pointers for step 7886

slots/16/latest.json

@@ -1 +1 @@
-{"worker_id": "slot:16", "checkpoint": "slots/16/checkpoint-6174", "step": 6174, "updated_at": 1776741553}
+{"worker_id": "slot:16", "checkpoint": "slots/16/checkpoint-7886", "step": 7886, "updated_at": 1776774529}