added dm.dfs_l0_query()

import re

from typing import Union

import numpy as np

from astropy.io import fits

from astropy.table import Table

from csst_dfs_api.msc.calmerge import CalMergeApi

        """ Push SLS spectra to DFS. """

        pass

    def dfs_l0_query(self, obs_id):

    def dfs_l0_query(self, obs_id: str = "100000100"):

        """ Query L0 data from DFS. """

        pass

        result = self.dfs_L0DataApi.find(obs_id=str(obs_id))

        print(f"{result.totalCount} entries returned from DFS.")

        if not result.code == 0:

            raise ValueError(f"DFS returns non-zero code! ({result.code})")

        tbl = Table([_.__dict__ for _ in result.data])

        tbl.sort(["detector_no", "obs_type"])

        # Check if all 30 detectors are available

        for detector in CP["all"]["detectors"]:

            for obs_type in ["sci", "cosmic_ray"]:

                if np.sum((tbl["detector_no"] == f"{detector:02d}") & (tbl["obs_type"] == obs_type)) == 0:

                    self.logger_ppl.warning(f"Record not found for detector {detector:02d} and obs_type {obs_type}")

        return tbl

    def dfs_l1_query(self, obs_id, detector):

        """ Query L1 data from DFS. """