All guards this instance registered, unioned across every resource it
touches. Dedups resources by resource key and results by _id.
Housekeeping only — never a verdict input (verdictGuardsForInstance
owns that), since this union reads datasources outside the engine's trust
boundary.
All guards this instance registered, unioned across every resource it touches. Dedups resources by resource key and results by
_id. Housekeeping only — never a verdict input (verdictGuardsForInstance owns that), since this union reads datasources outside the engine's trust boundary.