Remark: Top contact versus full tensor; relation to XVI-L

The split between the cutoff-independent top component and the cutoff-dependent lower-degree components matches the residue left open by XVI-L, thm:L6: “No explicit nonzero scaling residue (anomaly form) is claimed (Remark rem:Lressretch)”, where rem:Lressretch notes that “a nonzero homogeneous distribution of degree $-4$ may still have vanishing spherical average against the radial derivative of ${\varpi }_{\mu }$”. The value $r=-i/(8{\pi }^2)$ (Theorem thm:M6-S2) discharges only the top contact (the nonvanishing spherical average at $N=0$); the lower-degree, $\mu \mathrm{d}\varpi$-dependent contacts at $N\ge 1$ are not discharged.