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/Services/Academy/AcademyAccessService.php

@@ -13,6 +13,7 @@ use App\Models\AcademyLessonBlock;
 use App\Models\AcademyPromptPack;
 use App\Models\AcademyPromptTemplate;
 use App\Models\User;
+use Illuminate\Support\Facades\Cache;
 use Illuminate\Support\Facades\Storage;
 use Illuminate\Support\Str;
 use Laravel\Cashier\Subscription;
@@ -280,7 +281,9 @@ final class AcademyAccessService
     public function coursePayload(AcademyCourse $course, ?User $viewer, array $options = []): array
     {
         $progress = is_array($options['progress'] ?? null) ? $options['progress'] : null;
-        $lessonCount = (int) ($course->lessons_count_cache ?: $course->courseLessons()->count());
+        $lessonCount = $course->relationLoaded('courseLessons')
+            ? $course->courseLessons->count()
+            : (int) $course->lessons_count_cache;
 
         return [
             'id' => (int) $course->id,
@@ -1089,7 +1092,13 @@ final class AcademyAccessService
         }
 
         try {
-            $exists = Storage::disk((string) config('uploads.object_storage.disk', 's3'))->exists($normalizedPath);
+            $exists = (bool) Cache::remember(
+                'academy:asset-exists:'.$cacheKey,
+                3600,
+                function () use ($normalizedPath): bool {
+                    return Storage::disk((string) config('uploads.object_storage.disk', 's3'))->exists($normalizedPath);
+                },
+            );
         } catch (\Throwable) {
             $exists = false;
         }