Macro impl_serialization 

macro_rules! impl_serialization {
    ($type_name:ty, $model_type:expr, $type_str:expr) => { ... };
}

Macro to generate ModelSave and ModelLoad implementations for a model type.

This macro eliminates the repetitive boilerplate of implementing the serialization traits. Each model type only needs to specify:

• The type name
• The ModelType variant
• The type name string (for error messages)

Example

impl_serialization!(MyModel, ModelType::MyModel, "MyModel");

This expands to full implementations of both ModelSave and ModelLoad.