refactor(middleware): add middleware to record metrics for request count and duration (#7803)

crates/router/src/lib.rs

@@ -379,6 +379,7 @@ pub fn get_application_builder(
         // this middleware works only for Http1.1 requests
         .wrap(middleware::Http400RequestDetailsLogger)
         .wrap(middleware::AddAcceptLanguageHeader)
+        .wrap(middleware::RequestResponseMetrics)
         .wrap(middleware::LogSpanInitializer)
         .wrap(router_env::tracing_actix_web::TracingLogger::default())
 }