Hi Chetan,
For DAG pause/unpause actions performed through Airflow RBAC UI, the actions that are visible in Browse > Audit Logs in Airflow UI point to the user who performed them:
The numeric account ID can be mapped to user email through Security > List Users page in Airflow UI - you must have the Admin role in Airflow RBAC to see them. There are also other ways to resolve the Google Account numeric ID, outside of Airflow.
Unfortunately, for pause/unpause actions triggered through Airflow CLI, you will see 'cli_dag_pause' event with 'airflow' owner, not pointing to a specific user.
For DAGs paused/unpaused through Airflow UI, you can also see the requests in airflow-webserver Composer logs in Cloud Logging - but you won't see the caller identity this way:
I hope this helps.
Slawek