Perform multiple create, update, and delete node operations in a single request.
action: "create"data.type: Node type stringdata.position: { "x": number, "y": number }data.data: Optional metadata objectaction: "update"id: Node UUIDdata.type: Optional new typedata.position: Optional new positiondata.data: Optional new metadataaction: "delete"id: Node UUIDerrors array without rolling back successful operations.