include method in otel.name for incoming requests

Also change the name of the field from path to endpoint since it's not
the exact request path, and swap the order of method and endpoint.

src/main.rs

@@ -145,19 +145,21 @@ async fn run_server() -> Result<(), error::Serve> {
         .layer(axum::middleware::from_fn(spawn_task))
         .layer(TraceLayer::new_for_http().make_span_with(
             |request: &http::Request<_>| {
-                let path = if let Some(path) =
+                let endpoint = if let Some(endpoint) =
                     request.extensions().get::<MatchedPath>()
                 {
-                    path.as_str()
+                    endpoint.as_str()
                 } else {
                     request.uri().path()
                 };
 
+                let method = request.method();
+
                 tracing::info_span!(
                     "http_request",
-                    otel.name = path,
+                    otel.name = format!("{method} {endpoint}"),
-                    %path,
+                    %method,
-                    method = %request.method(),
+                    %endpoint,
                 )
             },
         ))