Before this, the inject-keel-annotations policy only fired on admission
events. Workloads that existed BEFORE their namespace got labeled
keel.sh/enrolled=true never received the annotation, so Keel didn't
watch them. Live state was 30 of 226 workloads auto-updating.
With mutateExistingOnPolicyUpdate=true and the required mutate.targets
block, Kyverno's BackgroundScan controller applies the mutate to
existing matching Deployments/StatefulSets/DaemonSets on policy update.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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