Fix: 'ModelField' object has no attribute 'annotation'

[Konnor-Young]

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Changes being requested

Made a change to check the field_info for 'annotation' prior to accessing. In an attempt to prevent the "'ModelField' object has no attribute 'annotation'" error.

Additional context & links

This is a potential fix for issue #2155

The issue mentions running into this error on library version 1.52.0 I was running into this error up to version 1.65.3

pydantic version 1.9.0 python version 3.9