chore(#1474): add reason= to remaining bare clippy allows outside dashboard

hive-c0re/src/server.rs

@@ -73,7 +73,11 @@ async fn handle(stream: UnixStream, coord: Arc<Coordinator>) -> Result<()> {
     }
 }
 
-#[allow(clippy::too_many_lines)]
+#[allow(
+    clippy::too_many_lines,
+    reason = "flat dispatch table: one match arm per host-socket request \
+              variant; splitting it would scatter the routing logic"
+)]
 async fn dispatch(req: &HostRequest, coord: Arc<Coordinator>) -> HostResponse {
     let result: anyhow::Result<HostResponse> = async {
         Ok(match req {