Memoize specialty nav and branch lookups to stop per-request N+1.

Sidebar was re-querying practitioners for every specialty module and also
calling ensureDefaultModulesProvisioned on each page render, which showed
up as multi-second PHP-FPM slow logs on Care.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Providers/AppServiceProvider.php

@@ -7,6 +7,7 @@ use App\Listeners\PlatformServiceEventListener;
 use App\Models\User;
 use App\Services\Care\OrganizationResolver;
 use App\Services\Care\PlanService;
+use App\Services\Care\SpecialtyModuleService;
 use Illuminate\Cache\RateLimiting\Limit;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Event;
@@ -18,7 +19,9 @@ class AppServiceProvider extends ServiceProvider
 {
     public function register(): void
     {
-        //
+        // Request-scoped memoization for specialty nav / branch scope (avoids N+1 per module).
+        $this->app->singleton(OrganizationResolver::class);
+        $this->app->singleton(SpecialtyModuleService::class);
     }
 
     public function boot(): void