fix: Disable pruning during reconciliation when objectSelector is used

Fixes issue where objects could be updated then deleted when the update
causes them to stop matching the objectSelector. Objects are still
cleaned up when the policy is deleted.

ref: https://issues.redhat.com/browse/ACM-26186

Author: dhaiducek

controllers/configurationpolicy_controller.go

@@ -551,7 +551,9 @@ func (r *ConfigurationPolicyReconciler) shouldEvaluatePolicy(
 
 // cleanUpChildObjects conditionally removed child objects that are no longer referenced in the
 // `newRelated` list, compared to what is currently in the policy. It does not delete anything in
-// inform mode, and it obeys the pruneObjectBehavior setting.
+// inform mode, and it obeys the pruneObjectBehavior setting. During normal reconciliation, cleanup
+// is skipped when any object template uses objectSelector to prevent deletion of objects that stop
+// matching the selector after being updated. Cleanup still occurs when the policy itself is deleted.
 func (r *ConfigurationPolicyReconciler) cleanUpChildObjects(
 	plc *policyv1.ConfigurationPolicy, newRelated []policyv1.RelatedObject, usingWatch bool,
 ) []string {
@@ -1029,6 +1031,13 @@ func (r *ConfigurationPolicyReconciler) handleObjectTemplates(plc *policyv1.Conf
 	var skipCleanupChildObjects bool
 
 	for index, objectT := range plc.Spec.ObjectTemplates {
+		// Check if any object template uses objectSelector - pruning should be disabled during
+		// normal reconciliation to prevent deletion of objects that stop matching the selector
+		if !skipCleanupChildObjects && objectT.ObjectSelector != nil {
+			skipCleanupChildObjects = true
+			log.V(2).Info("Disabling object cleanup during reconciliation because objectSelector is in use")
+		}
+
 		nsNameToResults := map[string]objectTmplEvalResult{}
 
 		var resolverToUse *templates.TemplateResolver