Implement creator studio and upload updates

app/Observers/ArtworkObserver.php

@@ -55,6 +55,10 @@ class ArtworkObserver
         // The pivot sync happens outside this observer, so we dispatch on every
         // meaningful update and let the job be idempotent (cheap if nothing changed).
         if ($artwork->is_public && $artwork->published_at) {
+            if ($artwork->wasChanged('published_at') || $artwork->wasChanged('created_at')) {
+                $this->userStats->setLastUploadAt($artwork->user_id, $artwork->created_at ?? $artwork->published_at);
+            }
+
             RecComputeSimilarByTagsJob::dispatch($artwork->id)->delay(now()->addSeconds(30));
             RecComputeSimilarHybridJob::dispatch($artwork->id)->delay(now()->addMinutes(1));