Revert "disable tracing macros"

This reverts commit 14e0d286f1efcc989ce679e451159fede6330bdf.

rust/src/view/mod.rs

@@ -11,7 +11,7 @@ pub struct Root;
 use crate::TopLevelPage;
 
 impl Root {
-    //#[tracing::instrument]
+    #[tracing::instrument]
     pub fn build(context: &Context, body: &Markup, active_page: Option<&TopLevelPage>) -> Markup {
         let menu_item = |item: TopLevelPage, active_page: Option<&TopLevelPage>| {
             let active = active_page.map_or(false, |page| *page == item);
@@ -117,7 +117,7 @@ impl Root {
 pub struct ErrorPage;
 
 impl ErrorPage {
-    //#[tracing::instrument]
+    #[tracing::instrument]
     pub fn build(message: &str) -> Markup {
         html!(
             (DOCTYPE)