💡(frontend) highlight technical debt

We should use participant attributes, rather than metadata, to store hand
status (raised/lowered). However, the useParticipantInfo hook is currently
not suited for this, as it does not refresh when attributes change.

src/frontend/src/features/rooms/livekit/hooks/useRaisedHand.tsx

@@ -7,6 +7,7 @@ type useRaisedHandProps = {
 }
 
 export function useRaisedHand({ participant }: useRaisedHandProps) {
+  // fixme - refactor this part to rely on attributes
   const { metadata } = useParticipantInfo({ participant })
   const parsedMetadata = JSON.parse(metadata || '{}')