add step_10000/_CHECKPOINT_METADATA

step_10000/_CHECKPOINT_METADATA

@@ -0,0 +1 @@
+{"item_handlers": {"assets": "openpi.training.checkpoints.CallbackHandler", "params": "orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler", "train_state": "orbax.checkpoint._src.handlers.pytree_checkpoint_handler.PyTreeCheckpointHandler"}, "metrics": {}, "performance_metrics": {}, "init_timestamp_nsecs": 1779617047446898166, "commit_timestamp_nsecs": 1779617061602286618, "custom_metadata": {}}