Update validation metadata: inputs/validation_input_manifest.json

inputs/validation_input_manifest.json

@@ -163,5 +163,10 @@
         }
       }
     }
+  },
+  "payload": "validation inputs",
+  "human_hand_format": {
+    "pose_representation": "absolute_per_frame",
+    "contains_delta_action": false
   }
 }