update slot resume pointers for step 494

slots/19/latest.json

@@ -1 +1 @@
-{"worker_id": "slot:19", "checkpoint": "slots/19/checkpoint-431", "step": 431, "updated_at": 1776360930}
+{"worker_id": "slot:19", "checkpoint": "slots/19/checkpoint-494", "step": 494, "updated_at": 1776388231}