migrate to serverless v4

[chrisbc]

• closing CHORE: migrate to serverless v4 #77

• ensure python 3.12 in all configs

• perform sls V4 upgrade (with yarn)

• tested DEV deploy/remove

• update pyproject.toml to PEP508

• update to latest model/common/solvis libs

• package audits yarn/poetry

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.80%. Comparing base (90f1f4f) to head (33df803).
⚠️ Report is 11 commits behind head on deploy-test.

Additional details and impacted files

@@             Coverage Diff              @@
##           deploy-test      #78   +/-   ##
============================================
  Coverage        95.80%   95.80%           
============================================
  Files               20       20           
  Lines             1143     1143           
  Branches            54       54           
============================================
  Hits              1095     1095           
  Misses              34       34           
  Partials            14       14           

Flag	Coverage Δ
unittests	95.80% <100.00%> (ø)

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[voj]

Looks great! Much smaller change than I feared.