chore(web): update hourly price update scheduler to run every 2 hours during market hours

src/dotnet/QuantEngine.Web/Pages/Admin/Operations/Index.cshtml.cs

@@ -133,7 +133,7 @@ public class IndexModel : PageModel
     private static string DescribeCron(string cron) => cron switch
     {
         "0 9 * * *" => "매일 09:00",
-        "0 9-15 * * 1-5" => "평일 09-15시 매시",
+        "0 9,11,13,15 * * 1-5" => "평일 2시간 단위 (09:00~15:00)",
         "0 17 * * 5" => "매주 금요일 17:00",
         "0 2 1 * *" => "매월 1일 02:00",
         _ => cron,

src/dotnet/QuantEngine.Web/Services/SchedulerService.cs

@@ -53,11 +53,11 @@ public class SchedulerService
                 new RecurringJobOptions { TimeZone = TimeZoneInfo.Local }
             );
 
-            // Hourly price update (during market hours 9 AM - 4 PM)
+            // Hourly price update (during market hours 9 AM - 4 PM, every 2 hours)
             _recurringJobManager.AddOrUpdate(
                 "hourly-price-update",
                 () => UpdatePricesAsync(),
-                "0 9-15 * * 1-5",  // Every hour, 9 AM to 3 PM, Mon-Fri
+                "0 9,11,13,15 * * 1-5",  // 9:00, 11:00, 13:00, 15:00 on Mon-Fri
                 new RecurringJobOptions { TimeZone = TimeZoneInfo.Local }
             );