5.5.2
(fix): Fix generated wire tests and dynamic snippets to honor pydantic_config.union_naming: v1.
Previously, variant class names in wire tests and README/reference snippets were always
emitted with the v0 suffix style (e.g. UnionName_Variant), causing import errors when
the SDK types were generated with v1 prefix-style names (e.g. VariantUnionName).