### 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)

"""DAG details."""
    owners = fields.Method("get_owners", dump_only=True)
    timezone = TimezoneField()
    catchup = fields.Boolean()
    orientation = fields.String()
    concurrency = fields.Method("get_concurrency")  
    max_active_tasks = fields.Integer()
    start_date = fields.DateTime()
    dag_run_timeout = fields.Nested(TimeDeltaSchema, attribute="dagrun_timeout")
    doc_md = fields.String()
    default_view = fields.String()
    params = fields.Method("get_params", dump_only=True)
    tags = fields.Method("get_tags", dump_only=True)  
    is_paused = fields.Method("get_is_paused", dump_only=True)
    is_active = fields.Method("get_is_active", dump_only=True)
    is_paused_upon_creation = fields.Boolean()
    end_date = fields.DateTime(dump_only=True)
    template_search_path = fields.String(dump_only=True)
    render_template_as_native_obj = fields.Boolean(dump_only=True)
    last_loaded = fields.DateTime(dump_only=True, data_key="last_parsed")
    @staticmethod
    def get_concurrency(obj: DAG):