Added time field to slow get helper logging (#20427)

refs
[CFR-36](https://linear.app/tryghost/issue/CFR-36/pull-out-response-time-from-ghost-logs-message-field-for-get-helper)

Added time field to slow get helper logging to make it easier to query
and filter on this value in elastic without having to parse the message
field

ghost/core/core/frontend/helpers/get.js

@@ -357,7 +357,9 @@ module.exports = async function get(resource, options) {
                         apiOptions,
                         returnedRows: returnedRowsCount
                     }
-                }));
+                }), {
+                    time: totalMs
+                });
             }
         }
     }