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

sgl-router/src/mcp/client_manager.rs

@@ -1,3 +1,5 @@
+use std::{borrow::Cow, collections::HashMap, time::Duration};
+
 use backoff::ExponentialBackoffBuilder;
 use dashmap::DashMap;
 use rmcp::{
@@ -13,7 +15,6 @@ use rmcp::{
     RoleClient, ServiceExt,
 };
 use serde::{Deserialize, Serialize};
-use std::{borrow::Cow, collections::HashMap, time::Duration};
 
 use crate::mcp::{
     config::{McpConfig, McpServerConfig, McpTransport},

sgl-router/src/mcp/config.rs

@@ -1,6 +1,7 @@
-use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 
+use serde::{Deserialize, Serialize};
+
 #[derive(Debug, Clone, Deserialize, Serialize)]
 pub struct McpConfig {
     pub servers: Vec<McpServerConfig>,

sgl-router/src/mcp/oauth.rs

@@ -1,5 +1,7 @@
 // OAuth authentication support for MCP servers
 
+use std::{net::SocketAddr, sync::Arc};
+
 use axum::{
     extract::{Query, State},
     response::Html,
@@ -8,7 +10,6 @@ use axum::{
 };
 use rmcp::transport::auth::OAuthState;
 use serde::Deserialize;
-use std::{net::SocketAddr, sync::Arc};
 use tokio::sync::{oneshot, Mutex};
 
 use crate::mcp::error::{McpError, McpResult};