Crashes on n_fid = 2 or n_guide = 4

[jeanconn]

I note that while testing in the "transform" branch, using an arbitrary science obsid, it looks like I can get this to reliably crash if I set n_fid to 2 or n_guide to 4. At console it looks like it is complaining about n_guide + n_fid < 8 but I think that should be allowed:

2024-11-13 15:15:53,001 _validate: n_fid + n_guide != 8
Traceback (most recent call last):
  File "/Users/jean/git/aperoll/aperoll/widgets/main_window.py", line 192, in _parameters_changed
    proseco_args = self.parameters.proseco_args()
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/jean/git/aperoll/aperoll/widgets/parameters.py", line 488, in proseco_args
    obsid = self.values["obsid"]
            ~~~~~~~~~~~^^^^^^^^^
KeyError: 'obsid'