telemetry: Enable span events in tests

Signed-off-by: Lann Martin <[email protected]>

Author: lann

crates/telemetry/src/testing.rs

@@ -1,8 +1,14 @@
+use tracing_subscriber::fmt::format::FmtSpan;
+
 /// Initializes telemetry integration for libtest environments.
 pub fn init_test_telemetry() {
     static ONCE: std::sync::Once = std::sync::Once::new();
     ONCE.call_once(|| {
-        if let Err(err) = tracing_subscriber::fmt().with_test_writer().try_init() {
+        if let Err(err) = tracing_subscriber::fmt()
+            .with_span_events(FmtSpan::CLOSE)
+            .with_test_writer()
+            .try_init()
+        {
             eprintln!("init_test_telemetry failed to init global tracing_subscriber: {err:?}");
         }
     });