Returns the platform-wide cryptographic-posture summary across ALL active tenants — the four
scalar CAPA-pillar aggregates (agility, modernization, governance, conformance). Scalars and
states only: no tenant identifier, key identifier, or policy field value.

Conformance enforces SIX simple-algorithm criteria — explicitAlgorithms, allowedCategories,
allowedLevels, allowedOperations, mandatoryStandards, minSecurityLevel — and applies FIVE of
them to composite algorithms (the per-entry allowedCategories check is not applied to
composites). SIX policy fields are not yet enforced: allowedFamilies, requireComposite,
allowedCompositeModes, allowedKdfs, customRules, regulatoryFramework. The conformance
evaluation is therefore deliberately partial.

This endpoint accepts no input and is designed for the platform CAPA-posture command center.

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