py3.14 newer pydantic

[mr-c]

• Python 3.14: test with newer pydantic
• circleci: upgrade to the larger arm instance

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.83%. Comparing base (649d5c9) to head (e110a60).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2146      +/-   ##
==========================================
- Coverage   84.89%   84.83%   -0.06%     
==========================================
  Files          46       46              
  Lines        8389     8389              
  Branches     1970     1970              
==========================================
- Hits         7122     7117       -5     
- Misses        800      804       +4     
- Partials      467      468       +1     

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