'dict object' has no attribute 'services' when using `docker_compose_v2`

SUMMARY

When using docker_compose_v2 with register: output it is no longer possible (despite documentation suggesting otherwise in the examples) to test against the value of output.services.service.container.state.running because services is no longer populated in the output dict.

output.containers exists, but this is just a list so can not be tested against as easily because the container name is not used as a key.

ISSUE TYPE

Bug Report

COMPONENT NAME

docker_compose_v2

ANSIBLE VERSION

ansible [core 2.16.3]
  config file = /home/shane/.ansible.cfg
  configured module search path = ['/home/shane/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python3/dist-packages/ansible
  ansible collection location = /home/shane/.ansible/collections:/usr/share/ansible/collections
  executable location = /usr/local/bin/ansible
  python version = 3.12.3 (main, Apr 10 2024, 05:33:47) [GCC 13.2.0] (/usr/bin/python3)
  jinja version = 3.1.2
  libyaml = True

COLLECTION VERSION

# /home/shane/.ansible/collections/ansible_collections
Collection       Version
---------------- -------
community.docker 3.10.4

# /usr/lib/python3/dist-packages/ansible_collections
Collection       Version
---------------- -------
community.docker 3.7.0

CONFIGURATION

ANSIBLE_NOCOWS(/home/shane/.ansible.cfg) = True
CONFIG_FILE() = /home/shane/.ansible.cfg

OS / ENVIRONMENT

Linux

STEPS TO REPRODUCE

- name: Debug
  hosts: localhost
  gather_facts: false
  tasks:
    - name: Run container with docker-compose.
      community.docker.docker_compose_v2:
        state: present
        pull: always
        remove_orphans: true
        project_name: ansibledemo
        wait: true
        definition:
          services:
            demo:
              image: traefik/whoami:latest
              restart: always
      register: output

    - name: Check services are running
      ansible.builtin.assert:
        that:
          - "output.services.ansibledemo.ansibledemo-demo-1.state.running"

EXPECTED RESULTS

Playbook TASK Check services are running to run successfully without errors.

ACTUAL RESULTS

TASK [Check services are running] *******************************************************
fatal: [localhost]: FAILED! => {"msg": "The conditional check 'output.services.ansibledemo.ansibledemo-demo-1.state.running' failed. The error was: error while evaluating conditional (output.services.ansibledemo.ansibledemo-demo-1.state.running): 'dict object' has no attribute 'services'. 'dict object' has no attribute 'services'"}

ansible-collections / community.docker