Returns the ROOT-gated per-tenant conformance breakdown behind the platform pillar-5
conformance scalar: one row per declared/governed active (non-ROOT) tenant, as per-tenant
COUNTS — governedKeys, conformingKeys, nonConformingKeys — plus the declared algorithm-policy
template and a measured flag. It names WHICH tenant holds non-conforming keys; it NEVER
reports which individual keys or any key material.

The rows reconcile with the posture-summary conformance scalar by construction (Σ per-tenant
== aggregate), since both are folded from the SAME single conformance pass.

This endpoint accepts no input.

Authorization: Requires platform.analytics.read scope AND platform (ROOT) tenant.