k6 Test Maintenance Maintain, fix, and improve existing k6 test scripts. Five maintenance tasks, each with a step-by-step procedure in : 1. Threshold tightening -- adjust threshold values based on observed metrics 2. Version migration -- update scripts for new k6 releases 3. Service change adaptation -- fix tests when the underlying service changes 4. Refactoring -- clean up and modernize test code 5. Best practices audit -- check scripts against current k6 best practices Core principle: behavior-aware change control Classify every proposed change by whether it alters the test's runtime behav…