chore: Add error logging for failed OpenTelemetry HTTP export

opentelemetry-otlp/src/exporter/http/trace.rs

@@ -46,7 +46,15 @@
         }
 
         Box::pin(async move {
-            client.send(request).await?;
+            let request_uri = request.uri().to_string();
+            let response = client.send(request).await?;
+
+            if !response.status().is_success() {
+                eprintln!(
+                    "OpenTelemetry export failed. Url: {}, Response: {:?}",
+                    request_uri, response
+                );
+            }
 
             Ok(())
         })