pub fn detector_control_nodes(graph: &CircuitGraph) -> Vec<usize>Expand description
The nodes of every PortClass::ControlInput electrode that is fed from the
output side (a BoundaryPolicy::DelayedSense sense sink) AND whose circuit
contains a cross-network coupler — i.e. a true DELAYED feedback detector’s
control electrode (LA-2A’s V4.grid).
Derivation: a control electrode whose node lands in passive_closure_from(out)
is driven from the output (the back-edge oracle, reused verbatim). Gated on a
EdgeKind::Behavioral-coupling component being present so it never fires on
op-amp/tube/passive feedback. Returns an empty vec for forward-only / passive
/ resistive-feedback circuits.