Function to_balanced_network_report 

pub fn to_balanced_network_report(
    net: &MulticonductorNetwork,
    options: MulticonductorToBalancedOptions,
) -> MulticonductorToBalancedReport

Check whether a multiconductor network is ready for the lowering pass.

This is a preflight only: it reports the assumptions and blockers that the lowering would need to account for, but it does not produce a balanced model and does not append to history.