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Hyunwoo Jung
a86aa43303
Add a new configuration property to prevent the application from starting when configuration keys that need to be migrated are found. With `on-error`, the application fails when keys that are no longer supported are found. With `on-warning`, it also fails when keys that have been renamed are found. The default, `never`, keeps the current behavior of only logging the report. See gh-51855 Signed-off-by: Hyunwoo Jung <hyunwoojung@kakao.com>