fix(controller): honor the configured ICMP probe interval

Use advanced_settings.tick_interval for Controller schedules so ICMP probe pacing follows the configured measurement cadence.

src/controller.rs

@@ -50,6 +50,7 @@ impl Controller {
         active_streams: Arc<RwLock<Vec<MeasurementStream>>>,
         endpoint_streams: Arc<RwLock<HashMap<SocketAddr, MeasurementStream>>>,
         source: MeasurementSource,
+        period: Duration,
     ) -> Self {
         Self {
             reflector_rx,
@@ -60,7 +61,7 @@ impl Controller {
             active_streams,
             endpoint_streams,
             source,
-            period: Duration::from_millis(500),
+            period,
             next_stream_id: 0,
             stream_ids: HashMap::new(),
         }