Function run_gs_continuum 

pub fn run_gs_continuum(
    storage_root: &Path,
    prompt: &str,
    seed: u64,
    steps: u32,
    width: u32,
    height: u32,
    recon_grid: u32,
    media_time_ms: u64,
) -> Result<GsContinuumResult, String>

Full continuum used before handing off to auditory work: generate → content-addressed store → heightfield recon → validate → OBJ + sealed .10d + generation receipt quins + geometry quins.