Constant STATIC_ROUTING_NATIVE 

pub const STATIC_ROUTING_NATIVE: &str = "- For repository-local questions, use `query` and `source_context` for persisted entities and relationships, then verify conclusions in live source.\n- For cross-repository questions, use Code System Graph to find entities, relationships, contracts, change impact, and pull-request overlap.\n";

Static routing policy when CodeGraph enrichment is unavailable.