BridgeAPI does not return project_id in the DownstreamPipeline

[mbench777]

Hello,

When using the Bridge API via the gitlab4j-api library, the DownstreamPipeline object returned does not contain the project_id property. This information is essential to identify the target project of the child pipeline triggered by a bridge.

Expected Behavior

The DownstreamPipeline object should expose the project_id field (as in the GitLab API JSON response) so users can easily obtain the project ID of the child pipeline.

Example GitLab API Response :

https://<GITLAB_HOST>/api/v4/projects/<PROJECT_ID>/pipelines/<PIPELINE_ID>/bridges

[
  {
    ...
    "downstream_pipeline": {
      "id": xxxxxxxxxxxxxxxxxxxx,
      "iid": xxxxxxxxxxxxxxxxxxxx,
      "project_id": xxxxxxxxxxxxxxxxxxxx,
      "sha": "xxxxxxxxxxxxxxxxxxxx",
      "ref": "xxxxxxxxxxxxxxxxxxxx",
      "status": "xxxxxxxxxxxxxxxxxxxx",
      "source": "xxxxxxxxxxxxxxxxxxxx",
      "created_at": "xxxxxxxxxxxxxxxxxxxx",
      "updated_at": "xxxxxxxxxxxxxxxxxxxx",
      "web_url": "xxxxxxxxxxxxxxxxxxxx"
    }
  }
]

Suggestion

Add the project_id property to the DownstreamPipeline model (https://github.com/gitlab4j/gitlab4j-api/blob/main/gitlab4j-models/src/main/java/org/gitlab4j/api/models/DownstreamPipeline.java#L11) and populate it when mapping API responses.

Thank you in advance for your help!