Fixes/upgrades

protocol/mizan-codegen/python/pydantic_to_rust/__init__.py

@@ -0,0 +1,35 @@
+"""Pydantic to Rust type conversion.
+
+Reads Pydantic class declarations and emits matching serde-derived Rust
+structs, so one declaration backs both tiers.
+
+What it covers: scalars, `Optional`, `list`/`set`/`tuple`, `dict`, string
+`Literal`s, unions, NewTypes, references to other models and enums, and
+Pydantic defaults. What it does not: methods, validators, generics, memory
+layout, and enum bodies — an enum lowers to a reference by name, leaving its
+declaration to the caller.
+"""
+
+from pydantic_to_rust.emit import emit_rust_struct
+from pydantic_to_rust.idents import to_rust_ident, to_rust_variant_ident
+from pydantic_to_rust.ir import (
+    DefaultValue,
+    FieldDecl,
+    ModelDecl,
+    Primitive,
+    TypeShape,
+)
+from pydantic_to_rust.walker import lower_annotation, walk_pydantic_model
+
+__all__ = [
+    "DefaultValue",
+    "FieldDecl",
+    "ModelDecl",
+    "Primitive",
+    "TypeShape",
+    "emit_rust_struct",
+    "lower_annotation",
+    "to_rust_ident",
+    "to_rust_variant_ident",
+    "walk_pydantic_model",
+]