[Bug] remap node ID with namespace causes introspection issues

[TomGrimwood]

Describe the bug

I am interested in running the zenoh-bridge-ros2dds docker image with the nodeID to be /robot3/cc_router, but without zenoh changing the namespace prefix of actions/services/topics that are sent through the zenoh-bridge, as the namespacing is already preconfigured internally.
e.g.

--ros-args -r __node:=cc_router -r __ns:=/robot3
ROS:/robot3/SearchArea <-> Zenoh:robot3/robot3/SearchArea/*

is undesirable.

I tried changing using the ros2 __node remap, e.g. --ros-args -r __node:=robot3/cc_router , which shows the desired node name when calling ros2 node list, and the zenoh behaviour works without changing the prefixes as desired.
However, issuing ros2 node info /robot3/cc_router no longer works:

root@tom:~# ros2 node list
/foxglove_bridge
/foxglove_bridge_component_manager
/robot3/cc_router

root@tom:~# ros2 node info /robot3/cc_router 
/robot3/cc_router
Traceback (most recent call last):
  File "/opt/ros/humble/bin/ros2", line 33, in <module>
    sys.exit(load_entry_point('ros2cli==0.18.9', 'console_scripts', 'ros2')())
  File "/opt/ros/humble/lib/python3.10/site-packages/ros2cli/cli.py", line 91, in main
    rc = extension.main(parser=parser, args=args)
  File "/opt/ros/humble/lib/python3.10/site-packages/ros2node/command/node.py", line 37, in main
    return extension.main(args=args)
  File "/opt/ros/humble/lib/python3.10/site-packages/ros2node/verb/info.py", line 59, in main
    subscribers = get_subscriber_info(
  File "/opt/ros/humble/lib/python3.10/site-packages/ros2node/api/__init__.py", line 85, in get_subscriber_info
    return get_topics(
  File "/opt/ros/humble/lib/python3.10/site-packages/ros2node/api/__init__.py", line 76, in get_topics
    names_and_types = func(node.name, node.namespace)
  File "/usr/lib/python3.10/xmlrpc/client.py", line 1122, in __call__
    return self.__send(self.__name, args)
  File "/usr/lib/python3.10/xmlrpc/client.py", line 1464, in __request
    response = self.__transport.request(
  File "/usr/lib/python3.10/xmlrpc/client.py", line 1166, in request
    return self.single_request(host, handler, request_body, verbose)
  File "/usr/lib/python3.10/xmlrpc/client.py", line 1182, in single_request
    return self.parse_response(resp)
  File "/usr/lib/python3.10/xmlrpc/client.py", line 1354, in parse_response
    return u.close()
  File "/usr/lib/python3.10/xmlrpc/client.py", line 668, in close
    raise Fault(**self._stack[0])
xmlrpc.client.Fault: <Fault 1: "<class 'rclpy._rclpy_pybind11.NodeNameNonExistentError'>:cannot get subscriber names and types for nonexistent node: error not set">

To reproduce

services:
  zenoh_namespace:
    image: eclipse/zenoh-bridge-ros2dds:latest
    init: true
    networks:
      - rosnet-1
    environment:
      - ROS_DISTRO=humble
      - ROS_DOMAIN_ID=0
      - RMW_IMPLEMENTATION=rmw_cyclonedds_cpp
    command: >
      --mode router
      --id cc_router
      --ros-args -r __node:=robot3/cc_router

  zenoh:
    image: eclipse/zenoh-bridge-ros2dds:latest
    init: true
    networks:
      - rosnet-1
    environment:
      - ROS_DISTRO=humble
      - ROS_DOMAIN_ID=0
      - RMW_IMPLEMENTATION=rmw_cyclonedds_cpp
    command: >
      --mode router
      --id cc_router_no_namespace
      --ros-args -r __node:=cc_router_no_namespace

  introspector:
    image: osrf/ros:humble-desktop
    networks:
      - rosnet-1
    restart: always
    tty: true
    command: 
      - bash
      - -c
      - |
        source /opt/ros/humble/setup.bash
        ros2 node list
        sleep 2
        ros2 node info /robot3/cc_router
        ros2 node info /cc_router_no_namespace


networks:
  rosnet-1:

System info

• Platform: Ubuntu 22.04 AMD64 & Raspberry Pi 5]
• CPU: AMD Ryzen 5 5600
• Zenoh Image eclipse/zenoh-bridge-ros2dds:0.11.0-rc.3