preprocess-tod cannot accept just an obs-id

[kmharrington]

Preprocess-tod does not work with only an obs_id passed in. Query is listed as optional, it does not appear to be optional 😂

>>> so-site-pipeline preprocess-tod --obs-id=obs_1741870288_satp1_1111111 20251215_satp1_configs/20251215_preprocess_satp1.yaml
Traceback (most recent call last):
  File "/global/homes/k/kmharrin/.local/soconda/20250710_0.2.1/bin/so-site-pipeline", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/global/homes/k/kmharrin/.local/soconda/20250710_0.2.1/lib/python3.12/site-packages/sotodlib/site_pipeline/cli.py", line 121, in main
    _main(**vars(args))
  File "/global/homes/k/kmharrin/.local/soconda/20250710_0.2.1/lib/python3.12/site-packages/sotodlib/site_pipeline/preprocess_tod.py", line 430, in main
    _main(executor=executor,
  File "/global/homes/k/kmharrin/.local/soconda/20250710_0.2.1/lib/python3.12/site-packages/sotodlib/site_pipeline/preprocess_tod.py", line 340, in _main
    obs_list = sp_util.get_obslist(context, query=query, obs_id=obs_id, min_ctime=min_ctime,
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/global/homes/k/kmharrin/.local/soconda/20250710_0.2.1/lib/python3.12/site-packages/sotodlib/site_pipeline/util.py", line 381, in get_obslist
    with open(query, "r") as fname:
         ^^^^^^^^^^^^^^^^
TypeError: expected str, bytes or os.PathLike object, not NoneType

This error can be bypassed just by sending in --query= type=='obs'

[mmccrackan]

I fixed this in #1348 which we'll probably merge this week.