Serialize improvements

[samuelcolvin]

• serializing enums, including workaround for PyTypeObject.ob_type is not available in cpython PyO3/pyo3#2905
• no fallback warning if the input is None
• no format if the input is None
• fallback not error on wrong type to model, no warning on fallback with None
• use ellipsis, not None in filtering.
• support for '__all__' special key value

[codspeed-hq]

CodSpeed Performance Report

Merging #370 serialize-enums (4e3cec5) will not alter performances.

Summary

🔥 0 improvements
❌ 0 regressions
✅ 80 untouched benchmarks

🆕 0 new benchmarks
⁉️ 0 dropped benchmarks

[codecov-commenter]

Codecov Report

Merging #370 (4e3cec5) into main (084c551) will increase coverage by 0.37%.
The diff coverage is 92.62%.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #370      +/-   ##
==========================================
+ Coverage   94.98%   95.36%   +0.37%     
==========================================
  Files          90       90              
  Lines       10036    10131      +95     
  Branches        4        4              
==========================================
+ Hits         9533     9661     +128     
+ Misses        501      470      -31     
+ Partials        2        0       -2     

Impacted Files	Coverage Δ
src/serializers/filter.rs	94.33% <90.47%> (-1.15%)	⬇️
src/serializers/ob_type.rs	86.95% <90.90%> (+0.28%)	⬆️
src/serializers/type_serializers/simple.rs	96.15% <92.85%> (+4.84%)	⬆️
src/serializers/type_serializers/format.rs	97.01% <93.33%> (-1.35%)	⬇️
src/serializers/extra.rs	95.00% <100.00%> (+0.19%)	⬆️
src/serializers/infer.rs	95.76% <100.00%> (+0.91%)	⬆️
src/serializers/type_serializers/model.rs	86.66% <100.00%> (+6.66%)	⬆️
src/validators/function.rs	99.42% <0.00%> (+0.57%)	⬆️
pydantic_core/core_schema.py	100.00% <0.00%> (+0.75%)	⬆️
... and 11 more

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