Optional bounded-score validation

A Ward residual is not automatically a bounded observable. To obtain a statistical certificate, an independently justified measurement bridge is required.

Index the real and imaginary parts of all evaluated matrix entries by $k=1,\dots ,m$. Let the target real residual coordinate be $w_k$. Supply a scale $a_k>0$, complete scores $Z_{ki}\in [-1,1]$, and allowances $b_k\ge 0$.