[router] Add rustfmt and set group imports by default (#11732)

sgl-router/src/core/worker.rs

@@ -1,19 +1,27 @@
-use super::{CircuitBreaker, WorkerError, WorkerResult};
-use crate::core::CircuitState;
-use crate::core::{BasicWorkerBuilder, DPAwareWorkerBuilder};
-use crate::grpc_client::SglangSchedulerClient;
-use crate::metrics::RouterMetrics;
-use crate::protocols::worker_spec::WorkerInfo;
+use std::{
+    fmt,
+    sync::{
+        atomic::{AtomicBool, AtomicUsize, Ordering},
+        Arc, LazyLock,
+    },
+    time::{Duration, Instant},
+};
+
 use async_trait::async_trait;
 use futures;
 use serde_json;
-use std::fmt;
-use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
-use std::sync::{Arc, LazyLock};
-use std::time::Duration;
-use std::time::Instant;
-use tokio::sync::{Mutex, RwLock};
-use tokio::time;
+use tokio::{
+    sync::{Mutex, RwLock},
+    time,
+};
+
+use super::{CircuitBreaker, WorkerError, WorkerResult};
+use crate::{
+    core::{BasicWorkerBuilder, CircuitState, DPAwareWorkerBuilder},
+    grpc_client::SglangSchedulerClient,
+    metrics::RouterMetrics,
+    protocols::worker_spec::WorkerInfo,
+};
 
 static WORKER_CLIENT: LazyLock<reqwest::Client> = LazyLock::new(|| {
     reqwest::Client::builder()
@@ -1024,10 +1032,10 @@ pub fn worker_to_info(worker: &Arc<dyn Worker>) -> WorkerInfo {
 
 #[cfg(test)]
 mod tests {
+    use std::{thread, time::Duration};
+
     use super::*;
     use crate::core::CircuitBreakerConfig;
-    use std::thread;
-    use std::time::Duration;
 
     #[test]
     fn test_worker_type_display() {
@@ -1502,9 +1510,10 @@ mod tests {
 
     #[test]
     fn test_load_counter_performance() {
-        use crate::core::BasicWorkerBuilder;
         use std::time::Instant;
 
+        use crate::core::BasicWorkerBuilder;
+
         let worker = BasicWorkerBuilder::new("http://test:8080")
             .worker_type(WorkerType::Regular)
             .build();