Function generate_python_model 

pub fn generate_python_model(
    model: &ModelIr,
    ir: &SchemaIr,
    is_async: bool,
    recursive_type_depth: usize,
) -> (String, String)

Generate complete Python code for a model.

is_async determines whether delegate methods use async def/await (true) or synchronous def + asyncio.run() wrappers (false). recursive_type_depth controls the depth of generated recursive include TypedDicts.