Register the route package edges in the architecture baseline

Why: The dependency ratchet blocks new edges by default; the unique
router's four edges (route->intentgate, runmgr->intentgate,
runmgr->route, server->route) are the I1 router's intended shape.

Evidence: lint-architecture.sh ok (73 edges) and negative probe ok.

Impact: Policy baseline only.

policy/architecture-baseline.json

@@ -33,10 +33,13 @@
   "backend/prompts backend/store",
   "backend/rag backend/settings",
   "backend/rag backend/store",
+  "backend/route backend/intentgate",
   "backend/runmgr backend/bus",
   "backend/runmgr backend/cardsvc",
   "backend/runmgr backend/ingest",
+  "backend/runmgr backend/intentgate",
   "backend/runmgr backend/profiles",
+  "backend/runmgr backend/route",
   "backend/runmgr backend/runtime",
   "backend/runmgr backend/settings",
   "backend/runmgr backend/store",
@@ -57,6 +60,7 @@
   "backend/server backend/profiles",
   "backend/server backend/prompts",
   "backend/server backend/ratelimit",
+  "backend/server backend/route",
   "backend/server backend/runmgr",
   "backend/server backend/settings",
   "backend/server backend/store",