Fix PydanticSchemaGenerationError

✅ Solution

PydanticSchemaGenerationError often arises when pydantic encounters unsupported or ambiguous type annotations. To fix it, ensure all type hints are resolvable and supported by pydantic, and enable `arbitrary_types_allowed = True` in your model config if you need to use types that pydantic doesn't natively understand, coupled with a suitable schema generation strategy (`@field_validator` for instance). Consider using `Annotated` to provide extra metadata to guide pydantic in complex cases.