A path facet: a deterministic tree built by splitting a hierarchical path field on separator.
Interior nodes are the path prefixes; scoping a search to one node matches that folder and everything
beneath it. Exempt from the near-unique/cardinality eligibility gates (those judge flat value sets).
Declared under AiKnowledgeBaseGraphConceptsConfig.pathFacets.
A path facet: a deterministic tree built by splitting a hierarchical path field on separator. Interior nodes are the path prefixes; scoping a search to one node matches that folder and everything beneath it. Exempt from the near-unique/cardinality eligibility gates (those judge flat value sets). Declared under AiKnowledgeBaseGraphConceptsConfig.pathFacets.