perf(subscriptions): batch the price-experiment feature resolution

Resolving PriceExperiment for the shared pricing prop added a separate Pennant
select+insert on every authenticated request, blowing the per-page query budget
(PageQueryCountTest). Warm all three features this response reads in one values()
call so the later per-feature reads hit Pennant's in-memory cache — back to one
round-trip, no extra queries.

app/Http/Middleware/HandleInertiaRequests.php

@@ -6,6 +6,7 @@ use App\Enums\BankingConnectionStatus;
 use App\Enums\BankingProvider;
 use App\Features\CalculateBalancesOnImport;
 use App\Features\Mcp;
+use App\Features\PriceExperiment;
 use App\Jobs\PurgeResidualEncryptionArtifactsJob;
 use App\Models\BankingConnection;
 use App\Services\CurrencyOptions;
@@ -70,6 +71,18 @@ class HandleInertiaRequests extends Middleware
             PurgeResidualEncryptionArtifactsJob::dispatch($user);
         }
 
+        // Warm every Pennant feature this response reads in a single round-trip, so
+        // the per-feature reads below (the price-experiment pricing variant and the
+        // feature flags) hit Pennant's in-memory cache instead of each issuing its
+        // own select + insert.
+        if ($user) {
+            Feature::for($user)->values([
+                CalculateBalancesOnImport::class,
+                Mcp::class,
+                PriceExperiment::class,
+            ]);
+        }
+
         return [
             ...parent::share($request),
             'flash' => [