saltybot_thermal 0.1.0 Jetson thermal monitor (Issue #205). Reads /sys/class/thermal/thermal_zone*, publishes /saltybot/thermal JSON at 1 Hz, warns at 75 °C, throttles at 85 °C. sl-jetson MIT rclpy std_msgs ament_python ament_copyright ament_flake8 ament_pep257 python3-pytest ament_python