[WIP] Changes needed to support execution via `alchemiscale-fah`

[dotsdl]

Includes all functionality needed for initial support of alchemiscale-fah, developed here: https://github.com/openforcefield/alchemiscale-fah/pull/7

Also closes:

• #107

[dotsdl]

@ianmkenney can I get a review on this one? I'll keep it [WIP] for now as we finish things out over on https://github.com/openforcefield/alchemiscale-fah/pull/7, but getting a review sooner than later here will help us address clear gaps.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 66.66667% with 32 lines in your changes missing coverage. Please review.

Project coverage is 80.23%. Comparing base (8d1feb3) to head (2763efc). Report is 37 commits behind head on main.

Files	Patch %	Lines
alchemiscale/compute/api.py	23.33%	23 Missing :warning:
alchemiscale/cli.py	0.00%	2 Missing :warning:
alchemiscale/compute/client.py	85.71%	2 Missing :warning:
alchemiscale/compute/service.py	90.00%	2 Missing :warning:
alchemiscale/storage/statestore.py	71.42%	2 Missing :warning:
alchemiscale/storage/cypher.py	50.00%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #218      +/-   ##
==========================================
- Coverage   81.63%   80.23%   -1.40%     
==========================================
  Files          26       27       +1     
  Lines        3371     3451      +80     
==========================================
+ Hits         2752     2769      +17     
- Misses        619      682      +63     

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[dotsdl]

Thanks so much @ianmkenney! I'm going to merge; any additional changes made to support alchemiscale-fah will come in subsequent PRs.