Implement instant websocket room updates

app/Services/Rooms/RoomParticipationService.php

@@ -12,6 +12,10 @@ use Illuminate\Validation\ValidationException;
 
 class RoomParticipationService
 {
+    public function __construct(
+        private readonly RoomRealtimeStateService $realtimeState,
+    ) {}
+
     public function findByJoinCode(string $joinCode): ?Room
     {
         if ($joinCode === '') {
@@ -92,6 +96,7 @@ class RoomParticipationService
             $room->id,
             $room->state_version,
             RoomStateChange::PlayerJoined,
+            $this->realtimeState->for($room),
         );
 
         return [$room, $player];