Repair: copy legacy joinDate into new user's created_at when creating users from legacy wallz

app/Services/Messaging/MessagingPayloadFactory.php

@@ -56,7 +56,7 @@ class MessagingPayloadFactory
             'title' => $conversation->title,
             'is_active' => (bool) ($conversation->is_active ?? true),
             'last_message_at' => optional($conversation->last_message_at)?->toIso8601String(),
-            'unread_count' => $conversation->unreadCountFor($viewerId),
+            'unread_count' => app(UnreadCounterService::class)->unreadCountForConversation($conversation, $viewerId),
             'my_participant' => $myParticipant ? $this->participant($myParticipant) : null,
             'all_participants' => $conversation->allParticipants
                 ->whereNull('left_at')
@@ -149,4 +149,4 @@ class MessagingPayloadFactory
 
         return $counts;
     }
-}
+}