Fix problems with time order of ephemeris data

[taldcroft]

Description

This fixes an issue that full-resolution ephemeris data from a cheta-sync maintained archive include data that are both duplicated and not in strict time order.

The raw ephemeris HDF5 archive files are non-monotonic because the archive FITS files are overlapping and have duplicate times. Typically new ephemeris files come out each 7 days and cover many weeks of data (e.g. about 10 weeks for the predictive EPHEM 0 files.

The HDF5 files on HEAD have TIME.quality set to bad for the duplicate times, so this code is not strictly required there. But for archives maintained with cheta_sync, the quality codes are not back-updated when new data appear, causing problems.

Fixes #245

Requires

None, but this should be considered as a required dependency for sot/xija#150.

cc: @matthewdahmer @christian-anderson @jzuhone

Interface impacts

None

Testing

Unit tests

• Mac

Independent check of unit tests by Jean

• Mac

(latest) flame:cheta jean$ pytest
============================================================================= test session starts ==============================================================================
platform darwin -- Python 3.12.8, pytest-8.3.4, pluggy-1.5.0
rootdir: /Users/jean/git
configfile: pytest.ini
plugins: anyio-4.7.0, timeout-2.3.1
collected 194 items                                                                                                                                                            

cheta/tests/test_comps.py ..............s.......................................................                                                                         [ 36%]
cheta/tests/test_data_source.py ...........                                                                                                                              [ 41%]
cheta/tests/test_fetch.py ........................................                                                                                                       [ 62%]
cheta/tests/test_intervals.py .........................                                                                                                                  [ 75%]
cheta/tests/test_orbit.py .                                                                                                                                              [ 75%]
cheta/tests/test_remote_access.py ......                                                                                                                                 [ 78%]
cheta/tests/test_sync.py ........                                                                                                                                        [ 82%]
cheta/tests/test_units.py ...........                                                                                                                                    [ 88%]
cheta/tests/test_units_reversed.py ...........                                                                                                                           [ 94%]
cheta/tests/test_utils.py ...........                                                                                                                                    [100%]

=============================================================================== warnings summary ===============================================================================
cheta/cheta/tests/test_comps.py: 14 warnings
  /Users/jean/miniforge3/envs/latest/lib/python3.12/site-packages/bs4/builder/_lxml.py:124: DeprecationWarning: The 'strip_cdata' option of HTMLParser() has never done anything and will eventually be removed.
    parser = parser(

cheta/cheta/tests/test_comps.py::test_cmd_states
  /Users/jean/miniforge3/envs/latest/lib/python3.12/site-packages/setuptools_scm/git.py:312: UserWarning: git archive did not support describe output
    warnings.warn("git archive did not support describe output")

cheta/cheta/tests/test_intervals.py::test_fetch_MSID_intervals
  /Users/jean/miniforge3/envs/latest/lib/python3.12/site-packages/django/utils/encoding.py:266: DeprecationWarning: 'locale.getdefaultlocale' is deprecated and slated for removal in Python 3.15. Use setlocale(), getencoding() and getlocale() instead.
    encoding = locale.getdefaultlocale()[1] or 'ascii'

cheta/cheta/tests/test_intervals.py::test_fetch_MSID_intervals
  /Users/jean/miniforge3/envs/latest/lib/python3.12/site-packages/django/http/request.py:1: DeprecationWarning: 'cgi' is deprecated and slated for removal in Python 3.13
    import cgi

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
=========================================================== 193 passed, 1 skipped, 17 warnings in 209.95s (0:03:29) ============================================================
(latest) flame:cheta jean$ git rev-parse HEAD
2008454e7f878f1deb91ac03326450e45b3aef3c

Functional tests

Additional functional testing in the included notebook.