[router] fix grpc client time out to 1h (#11768)

sgl-router/src/grpc_client/sglang_scheduler.rs

@@ -132,7 +132,7 @@ impl SglangSchedulerClient {
         };
 
         let channel = Channel::from_shared(http_endpoint)?
-            .timeout(Duration::from_secs(600)) // 10 minute timeout for connection
+            .timeout(Duration::from_secs(3600)) // 1 hr timeout for connection
             .http2_keep_alive_interval(Duration::from_secs(30))
             .keep_alive_timeout(Duration::from_secs(10))
             .keep_alive_while_idle(true)