Ship production optimization M1-M12.5A: queues, metrics, HTTP observability, and vector search reliability.

Keep similar-ai from tripping the global circuit on a lone URL 502, clamp Qdrant search to 100, and add Server-Timing plus slow-request logging. Studio shared props, Academy S3 exists caching, heat chunking, and Redis/scheduler hygiene stay in this rollout.

app/Jobs/Concerns/RestoresAfterArtworkIdCursor.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Jobs\Concerns;
+
+/**
+ * M1 added $afterArtworkId to RecCompute* jobs. Payloads serialized before that
+ * property existed leave a typed property uninitialized on unserialize, which
+ * fatals on first access. Constructor defaults do not apply to unserialize.
+ */
+trait RestoresAfterArtworkIdCursor
+{
+    protected function restoreAfterArtworkIdCursor(): void
+    {
+        if (! isset($this->afterArtworkId)) {
+            $this->afterArtworkId = null;
+        }
+    }
+
+    protected function afterArtworkId(): ?int
+    {
+        $this->restoreAfterArtworkIdCursor();
+
+        return $this->afterArtworkId;
+    }
+}