micro_ros_agent not found when launching sensor_combined_listener.launch.py

まだ誰も着手していません。

Background: I have a ros2-px4 docker container with micro-ROS installed (ros2 foxy).
I can successfully launch the micro-ros-agent with the command:
ros2 run micro_ros_agent micro_ros_agent udp4 --port 8888

But when I start another terminal and launch the sensor_combined_listener.launch.py-file in the px4_ros_com/launch package, I get the following error output:

```bash
[INFO] [micro_ros_agent udp4 --port 8888 -v -1]: process started with pid [529904]
[INFO] [sensor_combined_listener-2]: process started with pid [529906]
[micro_ros_agent udp4 --port 8888 -v -1] /bin/sh: 1: micro_ros_agent: not found
[ERROR] [micro_ros_agent udp4 --port 8888 -v -1]: process has died [pid 529904, exit code 127, cmd 'micro_ros_agent udp4 --port 8888 -v '].
```

It seems like the command micro_ros_agent is not recognized even though it was just used and started an agent.
In the default sensor_combined_listener.launch.py-file, the command for starting the agent was previously called "micro-ros-agent" which I have changed to "micro_ros_agent", which fixed previous errors, but this error is new and unknown to me.
(I have sourced the ros installation and ros workspace). I can do a colcon build in the ros workspace with only stderr outputs as errors, rest is built successfully (i.e. no packages fail to build), which does not say much specific.
This workspace contains both px4-dependencies and micro-ROS source files, but micro-ROS is supposed to be used together with PX4-Autopilot. The PX4-Autopilot-repo is located in a separate src-folder.

Thankful for any help!

px4_ros_com/launch/sensor_combined_listener.launch.py から始め、agent コマンドを成功した呼び出し `ros2 run micro_ros_agent micro_ros_agent udp4 --port 8888` と比較します。launch プロセスが source 済みの環境で実行可能ファイルをどのように解決するかを確認します。launch が終了コード 127 なしで micro-ROS agent を起動し、sensor listener も起動すれば完了です。

索引モデルが issue の本文から書いたものです。