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.

tests/Unit/Jobs/RecComputeSimilarByBehaviorJobTest.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Unit\Jobs;
+
+use App\Jobs\RecComputeSimilarByBehaviorJob;
+use Tests\TestCase;
+
+final class RecComputeSimilarByBehaviorJobTest extends TestCase
+{
+    public function test_job_timeout_stays_below_queue_retry_after(): void
+    {
+        $job = new RecComputeSimilarByBehaviorJob();
+
+        $this->assertLessThan(
+            (int) config('queue.connections.redis.retry_after'),
+            $job->timeout,
+        );
+    }
+
+    public function test_batch_jobs_do_not_use_without_overlapping_middleware(): void
+    {
+        $this->assertFalse(method_exists(new RecComputeSimilarByBehaviorJob(), 'middleware'));
+    }
+}