Fix empty audit event values for formatted fields

audit/audit.go

@@ -277,9 +277,13 @@ func CheckToFormatForAuditEvent(changes map[string]any, original any, new any, f
 			fieldChange := FieldChange{}
 			if originalFormattedObject != nil {
 				fieldChange.From = []string{*originalFormattedObject}
+			} else {
+				fieldChange.From = []string{}
 			}
 			if newFormattedObject != nil {
 				fieldChange.To = []string{*newFormattedObject}
+			} else {
+				fieldChange.To = []string{}
 			}
 			changes[objectKey] = fieldChange
 		} else {