Macro lazy_output

macro_rules! lazy_output {
    (
        $(
            $variant:ident ( $ty:ty )
        ),* $(,)?
    ) => { ... };
}

Defines the LazyOutput enum for LazyBalance operations.

Each variant represents an operation input, with typed fields encoded as tuples and mapped via FromTag / TryIntoTag.

Enables type-safe, tag-driven dispatch into LazyBalance::BalanceFamily plugins.