EVO-47 db-lane: redefine vAppErrorsRecent + vAppAlertsRecent to expose level + category + normalizedRoute; redefine rollup signature = normalizedRoute+level+category (subsumes EVO-46 lane-2 distinctPaths). Enables the level/category-aware alert-suppression predicate. Audit pre-apply DDL gate (reversible CREATE OR REPLACE VIEW). BLOCKED: Mars db agent offline — apply queues for db-mars launch; audit preps read-only DDL spec meanwhile.