Function route_section 

pub fn route_section(
    circuit: &Circuit,
    route: &RuntimeRoute,
    plan: &FusionPlan,
    header: &Header,
    notes: &Notes<'_>,
) -> String

2026-09-30: A runtime route’s arm, rendered after the primary plan: a heading that names the route, its condition and the settings it plans as, then the arm’s plan under header. 2026-10-02: With notes (render_noted).