Incident log - checkout service outage

14:02 - Alert fired: checkout API error rate above 5%.
14:06 - On-call engineer acknowledges the page.
14:14 - Root cause suspected: a config change deployed at 13:55 to the payment gateway service.
14:20 - Rollback of the 13:55 config change initiated.
14:31 - Rollback completed, error rate starts dropping.
14:38 - Error rate back to baseline, checkout confirmed working end-to-end.
14:40 - Incident declared resolved.