PyStratify 0.10.5

Cylinder emitters at a mode's cutoff. Next to a light line the reflected spectral density of a cylinder source lost digits (its m = ±1 TE/TM-coupled terms carry 1/q factors that cancel), so a guided mode just above cutoff made the quadrature chase noise until its evaluation budget ran out — an error instead of a result; with scipy 1.18 even a plain fibre did so at tolerance 1e-7. Within 1e-3 of the host's and the source medium's light lines the real part now comes from the exact power balance at that axial wavenumber (escape + absorbed − direct), which equals the reflected density to ~1e-14 wherever that is accurate. Over 60 random lossless cylinders the budget errors fall from 12 to 2; converged results are unchanged.