chore: use hyphens for Router-related keys (#4325)

Signed-off-by: PeaBrane <yanrpei@gmail.com>

lib/llm/src/discovery.rs

@@ -11,4 +11,4 @@ mod worker_monitor;
 pub use worker_monitor::{KvWorkerMonitor, WorkerLoadState};
 
 /// The root etcd path for KV Router registrations
-pub const KV_ROUTERS_ROOT_PATH: &str = "v1/kv_routers";
+pub const KV_ROUTERS_ROOT_PATH: &str = "v1/kv-routers";

lib/llm/src/kv_router/subscriber.rs

@@ -479,10 +479,6 @@ async fn cleanup_orphaned_consumers(
     };
 
     // Filter to only routers for this component
-    // Note: keys differ between storage backends:
-    // - FileStore: "namespace/component/uuid" (relative to bucket)
-    // - EtcdStore: "v1/kv_routers/namespace/component/uuid" (full path)
-    // Use contains() to handle both cases
     let component_path = component.path();
     let active_uuids: HashSet<String> = entries
         .iter()