feat: Add StrictEnumField with better validation

[wschurman]

Why

Not having this more strict validation I think was an oversight. But it's too late to add it to EnumField since there needs to be a path to gradually migrate since some fields may not be providing valid values currently.

How

Add StrictEnumField, which also takes the enum type as an argument and validates against the possible values.

Test Plan

Run test.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.48%. Comparing base (3377129) to head (05c2bb7).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #222      +/-   ##
==========================================
+ Coverage   95.46%   95.48%   +0.01%     
==========================================
  Files          79       79              
  Lines        2074     2080       +6     
  Branches      282      283       +1     
==========================================
+ Hits         1980     1986       +6     
  Misses         88       88              
  Partials        6        6              

Flag	Coverage Δ
integration	95.48% <100.00%> (+0.01%)	⬆️
unittest	95.48% <100.00%> (+0.01%)	⬆️

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