Function evaluate_segment_wiring_mle 

pub fn evaluate_segment_wiring_mle<F: FieldOps>(
    mul_constraints: &[MulConstraint<WitnessIndex>],
    segment: WitnessSegment,
    lambda: &F,
    r_x_tensor: &[F],
    r_y: &[F],
) -> F

Evaluates the wiring MLE for a specific segment at a point (r_x, r_y).

r_x_tensor is the equality indicator expanded at r_x, one scalar per vertex. Accepting it as a parameter avoids recomputing it for every segment sharing that r_x.