chore: add todo note with flag to remember a refactor (#10811)

So that we remember to revisit this line when we remove the flag.

frontend/src/hooks/api/getters/useInsights/useInsights.ts

@@ -18,6 +18,7 @@ type InstanceInsightsWithLabels = InstanceInsightsSchema & {
     labels: { date: string; week: string }[];
 };
 
+// todo (lifecycleGraphs): consider moving this to the API instead.
 const generateWeekLabels = (
     start: string,
     end: string,