### 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)

return obj.max_active_tasks
    @staticmethod
    def get_tags(obj: DAG):
        """Dump tags as objects."""
        tags = obj.tags
        if tags:
            return [DagTagSchema().dump({"name": tag}) for tag in tags]
        return []
    @staticmethod
    def get_owners(obj: DAG):
        """Convert owners attribute to DAG representation."""
        if not getattr(obj, "owner", None):
            return []
        return obj.owner.split(",")
    @staticmethod
    def get_is_paused(obj: DAG):
        """Check entry in DAG table to see if this DAG is paused."""
        return obj.get_is_paused()
    @staticmethod
    def get_is_active(obj: DAG):
        """Check entry in DAG table to see if this DAG is active."""
        return obj.get_is_active()
    @staticmethod
    def get_params(obj: DAG):
        """Get the Params defined in a DAG."""
        params = obj.params
        return {k: v.dump() for k, v in params.items()}
class DAGCollection(NamedTuple):