koji_task_id is never set in the compose_status.json

[thozza]

The builder plugin's ComposeStatus implementation contains koji_task_id:

koji-osbuild/plugins/builder/osbuild.py

Line 242 in 18c24c4

self.koji_task_id = task_id

and it sets it unconditionally when encoding it as a dict:

koji-osbuild/plugins/builder/osbuild.py

Line 259 in 18c24c4

"koji_task_id": self.koji_task_id,

However, the ComposeStatus as returned by osbuild-composer API contains only Build ID:
https://github.com/osbuild/osbuild-composer/blob/f889be9e05d953aa63579dd7734815bece7a822c/internal/cloudapi/v2/openapi.v2.yml#L664-L669

As a result, the koji_task_id is always set to null in the compose_status.jsonuploaded to the Koji task. Example:
https://kojipkgs.fedoraproject.org//work/tasks/4169/103884169/compose-status.json