### What do you see as an issue?

The [/dags/{dag_id}/details](https://airflow.apache.org/docs/apache-airflow/stable/stable-rest-api-ref.html#operation/post_set_task_instances_state) endpoint of the REST API does not return all of the keys that are listed in the documentation. If I run `curl -X GET localhost:8080/api/v1/dags/{my_dag}/details`, then compare the results with the results in the documentation, you can see the following missing keys:

```python
>>> for key in docs.keys():
...     if not key in actual.keys():
...             print(key)
...
root_dag_id
last_parsed_time
last_pickled
last_expired
scheduler_lock
timetable_description
has_task_concurrency_limits
has_import_errors
next_dagrun
next_dagrun_data_interval_start
next_dagrun_data_interval_end
next_dagrun_create_after
template_search_path
```

### Solving the problem

Either remove these keys from the documentation or fix the API endpoint

### Anything else

_No response_

### Are you willing to submit PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

"""
        Deactivate any DAGs that were last touched by the scheduler before the expiration date.
        These DAGs were likely deleted.
        :param expiration_date: set inactive DAGs that were touched before this time
        :return: None
        """
        for dag in session.scalars(
            select(DagModel).where(DagModel.last_parsed_time < expiration_date, DagModel.is_active)
        ):
            log.info(
                "Deactivating DAG ID %s since it was last touched by the scheduler at %s",
                dag.dag_id,
                dag.last_parsed_time.isoformat(),
            )
            dag.is_active = False
            session.merge(dag)
            session.commit()
    @staticmethod
    @provide_session
    def get_num_task_instances(dag_id, run_id=None, task_ids=None, states=None, session=NEW_SESSION) -> int:
        """
        Return the number of task instances in the given DAG.
        :param session: ORM session
        :param dag_id: ID of the DAG to get the task concurrency of