Strategist service initial implementation, with help from Claude Code.

[dotsdl]

Closes #374.

Implements the design described here: https://broaderthings.org/posts/design-docs/alchemiscale-strategist

[dotsdl]

This is ready for review @ianmkenney! I'm still working on the user guide, but please review the implementation and test suite when you get the chance since there's quite a lot here!

[codecov]

Codecov Report

❌ Patch coverage is 66.17100% with 182 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.47%. Comparing base (b769b3f) to head (59f7c73).
⚠️ Report is 19 commits behind head on main.

Files with missing lines	Patch %	Lines
alchemiscale/strategist/service.py	46.02%	156 Missing ⚠️
alchemiscale/cli.py	16.66%	15 Missing ⚠️
alchemiscale/storage/statestore.py	92.94%	6 Missing ⚠️
alchemiscale/interface/api.py	91.37%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #421      +/-   ##
==========================================
- Coverage   80.14%   78.47%   -1.68%     
==========================================
  Files          28       29       +1     
  Lines        4226     4733     +507     
==========================================
+ Hits         3387     3714     +327     
- Misses        839     1019     +180     

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[dotsdl]

Ready for another review @ianmkenney! I am still working on the user guide to make it more terse and understandable, but please review the rest!

[ianmkenney]

Thanks for addressing those comments. Functionally, this looks promising!