OpenLineage: Add AirflowRunFacet to DAG run events #40798

Description

Add AirflowDagRunFacet facet for DAG run events.

Use case/motivation

Currently AirflowRunFacet is present only RunEvents produces by Airflow tasks (containing fields dag, dag_run, task, task_instance). But DAG can be started too, and it currently contains only AirflowJobFacet (fields like taskTree, taskGroups and so on).

Having dag_run field allows custom OpenLineage backend implementations to have URL for Airflow UI page of a particular DagRun, as well as have custom logic based on run_type field value.

Related issues

No response

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct