Update observatory, states & observations

[danjampro]

• Big simplification of state machine to remove preparing, slewing, dithering and analyzing states
• HuntsmanObservatory instances associated with a HuntsmanPOCS instance have access to safety info and can call the is_safe method.
• Fixes an issue where exposures in CompoundObservations would end up in the wrong directory by using explicit calls to observation.mark_exposure_complete rather than relying on the number of exposures associated with the "primary" camera
• Consolidates a lot of the observing logic into a macro function observatory.take_observation_block
• Fixes the logger (again???)
• Adds new fine_focus_required logic and config items to HuntsmanObservatory, with a future aim to include temperature gradients

Hopefully this will help speed up some observations.

Related #430 Closes #424 Closes #420

[codecov[bot]]

Codecov Report

Merging #432 (3ca99cb) into develop (a35cc9f) will increase coverage by 1.13%. The diff coverage is 75.00%.

@@             Coverage Diff             @@
##           develop     #432      +/-   ##
===========================================
+ Coverage    55.44%   56.57%   +1.13%     
===========================================
  Files           62       57       -5     
  Lines         3795     3747      -48     
  Branches       392      396       +4     
===========================================
+ Hits          2104     2120      +16     
+ Misses        1601     1526      -75     
- Partials        90      101      +11     

Impacted Files	Coverage Δ
...rc/huntsman/pocs/scheduler/observation/dithered.py	100.00% <ø> (ø)
src/huntsman/pocs/states/huntsman/observing.py	0.00% <0.00%> (ø)
src/huntsman/pocs/states/huntsman/scheduling.py	0.00% <0.00%> (ø)
src/huntsman/pocs/states/huntsman/taking_darks.py	0.00% <0.00%> (ø)
src/huntsman/pocs/core.py	62.85% <66.66%> (-5.90%)	:arrow_down:
src/huntsman/pocs/observatory.py	68.84% <70.51%> (-1.12%)	:arrow_down:
src/huntsman/pocs/scheduler/field.py	94.28% <100.00%> (-0.09%)	:arrow_down:
src/huntsman/pocs/scheduler/observation/base.py	75.00% <100.00%> (+0.80%)	:arrow_up:
src/huntsman/pocs/utils/logger.py	100.00% <100.00%> (ø)
tests/test_observatory.py	94.66% <100.00%> (+0.38%)	:arrow_up:
... and 3 more

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