`ros2 topic echo /kachaka/layout/locations/list` does not show any message from brdige

[fujitatomoya]

Setup Procedure

1. setup ros:humble workspace with https://docs.ros.org/en/humble/Installation/Alternatives/Ubuntu-Development-Setup.html# (with https://github.com/ros2/ros2/commit/74aa2018edb0eca9e80b4d279f71195d3ab207cf)
2. start bridge as described in https://github.com/pf-robotics/kachaka-api#%E5%8B%95%E4%BD%9C%E7%A2%BA%E8%AA%8D

tomoyafujita@~/DVT/docker_ws/kachaka-api/tools/ros2_bridge >pwd
/home/tomoyafujita/DVT/docker_ws/kachaka-api/tools/ros2_bridge
tomoyafujita@~/DVT/docker_ws/kachaka-api/tools/ros2_bridge >./start_bridge.sh 192.168.1.226
...

3. Build kachaka required interfaces with colcon workspace.

root@tomoyafujita:~/docker_ws/ros2_humble/src/ros2# ls -lt | grep kachaka
lrwxrwxrwx  1 1000 1000   46 Dec  6 18:26 kachaka_description -> ../../../kachaka-api/ros2/kachaka_description/
lrwxrwxrwx  1 1000 1000   45 Dec  6 18:25 kachaka_interfaces -> ../../../kachaka-api/ros2/kachaka_interfaces/
root@tomoyafujita:~/docker_ws/ros2_humble/src/ros2# cd ../../
root@tomoyafujita:~/docker_ws/ros2_humble# colcon build --symlink-install

4. check ROS 2 topics from colcon workspace created procedure-1

root@tomoyafujita:~/docker_ws/ros2_humble# source install/local_setup.bash 
root@tomoyafujita:~/docker_ws/ros2_humble# ros2 topic list
/goal_pose
/kachaka/front_camera/camera_info
/kachaka/front_camera/image_raw
/kachaka/front_camera/image_raw/compressed
/kachaka/imu/imu
/kachaka/layout/locations/list
/kachaka/layout/shelves/list
/kachaka/lidar/scan
/kachaka/manual_control/cmd_vel
/kachaka/mapping/map
/kachaka/object_detection/result
/kachaka/odometry/odometry
/kachaka/robot_info/version
/kachaka_description/joint_states
/kachaka_description/robot_description
/parameter_events
/rosout
/tf
/tf_static

5. ros2 topic echo

root@tomoyafujita:~/docker_ws/ros2_humble# ros2 topic echo /kachaka/layout/locations/list
### NO OUTPUT ###

Expected Behavior

root@tomoyafujita:~/docker_ws/ros2_humble# ros2 topic echo /kachaka/layout/locations/list

should print the kachaka_interfaces/msg/LocationList.