Utilize polymorphic_serialization instead of Metaclass to adjust annotations

[NeejWeej]

Utilize the polymorphic_serialization flag introduced in this PR:

pydantic/pydantic#12518

This PR will fail to build until a pydantic release has this feature in it.

[NeejWeej]

I think this is blocked by this: pydantic/pydantic#12382

Ex a build error. that occured:

E pydantic_core._pydantic_core.PydanticSerializationError: Unable to serialize unknown type: <class 'ccflow.tests.test_base_serialize.MyEnum'>

Even though MyEnum has a pydantic core schema defined (it's a ccflow enum)

Notably, the above issue states:

That first recommendation is what we currently do with the MetaClass, and apply the SerializeAsAny annotation to pydantic BaseModels here: https://github.com/Point72/ccflow/blob/main/ccflow/base.py#L117

It seems we can't move off of that until these issues are addressed

[github-actions]

Test Results

643 tests  +3   641 ✅ +3   1m 41s ⏱️ ±0s
  1 suites ±0     2 💤 ±0 
  1 files   ±0     0 ❌ ±0 

Results for commit 74c1ae8. ± Comparison against base commit cde4fbb.

This pull request removes 1 and adds 4 tests. Note that renamed tests count towards both.

ccflow.tests.test_base_serialize.TestBaseModelSerialization ‑ test_serialize_as_any

ccflow.tests.test_base_serialize.TestBaseModelSerialization ‑ test_serialization_nested_subclass_uses_duck_typing
ccflow.tests.test_evaluation_context_serialization ‑ test_mec_model_dump_basic
ccflow.tests.test_evaluation_context_serialization ‑ test_mec_model_dump_diamond_graph
ccflow.tests.test_evaluation_context_serialization ‑ test_mec_model_dump_with_multi_evaluator

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.02%. Comparing base (cde4fbb) to head (74c1ae8).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #127      +/-   ##
==========================================
+ Coverage   95.96%   96.02%   +0.06%     
==========================================
  Files         140      141       +1     
  Lines        9680     9679       -1     
  Branches      563      551      -12     
==========================================
+ Hits         9289     9294       +5     
+ Misses        273      270       -3     
+ Partials      118      115       -3     

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