- invalidateRuleResultCacheByRelation now walks the transitive closure of
the dependency index (owner -> is_owner -> computed can_read): mutating
a base relation left computed/multi_hop results stale
- _collectRelationUsages registers multi_hop and parent rule relations
(parentRelation + subject relation) so their caches invalidate on
base-relation mutations
- advanced-rule-kinds.test.js: multi_hop (min-over-path, depth-limited),
computed (userset alias), parent (subject relation on the target's
parent) through the full check() path under random mutations
John Dvorak