Function spp_robust_fde_driver 

pub fn spp_robust_fde_driver(
    eph: &dyn EphemerisSource,
    inputs: &SolveInputs,
    with_geodetic: bool,
    robust: RobustConfig,
    options: &FdeSppOptions,
) -> Result<FdeResult<ReceiverSolution>, FdeError<FdeSppError>>

Run robust-reweighted SPP under the RAIM/FDE exclusion loop.

This is the robust-specific composition of RobustConfig and fde_spp. It clones the inputs, installs robust, then delegates to fde_spp, which delegates each candidate solve to solve and each exclusion step to fde.