add module name to request span

Author: sufeng-buaa

sgl-router/src/middleware.rs

@@ -203,6 +203,7 @@ impl<B> MakeSpan<B> for RequestSpan {
             status_code = Empty,
             latency = Empty,
             error = Empty,
+            module = "sglang::router_rs"
         )
     }
 }