The reusable canary workflow declares a default ceph_images value that is never used: both callers always pass an explicit image list. A stale default is a drift hazard because a new caller could silently exercise the wrong image. Drop the default and mark the input required so callers must choose deliberately.
Signed-off-by: Joshua Hoblitt <josh@hoblitt.com>
(cherry picked from commit f40167be78)