ob_camera_node.h declares three std::queue members (color_frame_queue_,
left_color_frame_queue_, right_color_frame_queue_) but never includes
<queue>. The header only compiles where <queue> happens to be pulled in
transitively by another include, which the standard does not guarantee.
On ROS 2 Humble / Ubuntu 22.04 with GCC 11.4 the build fails with
'std::queue does not name a template type'.
Add the include to the standard-library block, keeping alphabetical order.
