### 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)

self,
        start_date: pendulum.DateTime,
        num: int | None = None,
        end_date: datetime | None = None,
    ) -> list[datetime]:
        message = "`DAG.date_range()` is deprecated."
        if num is not None:
            warnings.warn(message, category=RemovedInAirflow3Warning, stacklevel=2)
            with warnings.catch_warnings():
                warnings.simplefilter("ignore", RemovedInAirflow3Warning)
                return utils_date_range(
                    start_date=start_date, num=num, delta=self.normalized_schedule_interval
                )
        message += " Please use `DAG.iter_dagrun_infos_between(..., align=False)` instead."
        warnings.warn(message, category=RemovedInAirflow3Warning, stacklevel=2)
        if end_date is None:
            coerced_end_date = timezone.utcnow()
        else:
            coerced_end_date = end_date
        it = self.iter_dagrun_infos_between(start_date, pendulum.instance(coerced_end_date), align=False)
        return [info.logical_date for info in it]
    def is_fixed_time_schedule(self):