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/Feature/Http/RssPresenceSkipTest.php

@@ -0,0 +1,11 @@
+<?php
+
+use App\Services\Traffic\OnlineVisitorRepository;
+
+it('does not record presence for RSS feed requests', function () {
+    $this->mock(OnlineVisitorRepository::class, function ($mock): void {
+        $mock->shouldReceive('track')->never();
+    });
+
+    $this->get('/rss/latest-uploads.xml')->assertOk();
+});