FIX: correctly log topic timings as background

lib/hijack.rb

@@ -89,7 +89,7 @@ module Hijack
           io.close if io rescue nil
 
           if request_tracker
-            status = instance.status rescue 500
+            status = response.status rescue 500
             request_tracker.log_request_info(env, [status, headers || {}, []], timings)
           end
         end

lib/middleware/request_tracker.rb

@@ -97,7 +97,7 @@ class Middleware::RequestTracker
       status: status,
       is_crawler: helper.is_crawler?,
       has_auth_cookie: helper.has_auth_cookie?,
-      is_background: request.path =~ /^\/message-bus\// || request.path == /\/topics\/timings/,
+      is_background: !!(request.path =~ /^\/message-bus\// || request.path =~ /\/topics\/timings/),
       is_mobile: helper.is_mobile?,
       track_view: track_view,
       timing: timing