RPKI validity of an ASN's registry route objects

The ASN's RIPE Database registry route / route6 objects (inverse origin), each annotated with its RPKI Route Origin Validation verdict (valid / invalid / unknown), plus a summary. NOTE: the RIPE Database 'roa-check' search parameter is a no-op over the JSON REST API (verified live - it adds no annotation to the returned objects), so the verdict is computed per route from RPKI validation (prefix + origin). Complements the single-prefix /prefix/{cidr}/rpki with the AS-wide registry view. Upstream registry: 'global' (all RIRs via GRS, default) | ripe | ripe-nonauth | <rir>-grs.