Add IsRealTime Flag

Author: Haiping Chen

src/Infrastructure/BotSharp.Core.Crontab/Abstraction/ICrontabSource.cs

@@ -5,5 +5,10 @@ namespace BotSharp.Core.Crontab.Abstraction;
 /// </summary>
 public interface ICrontabSource
 {
+    /// <summary>
+    /// Set to true if the cron is real-time like Change Data Capture (CDC).
+    /// </summary>
+    bool IsRealTime => false;
+
     CrontabItem GetCrontabItem();
 }

src/Infrastructure/BotSharp.Core.Crontab/Services/CrontabService.cs

@@ -51,6 +51,10 @@ public async Task<List<CrontabItem>> GetCrontable()
         var cronsources = _services.GetServices<ICrontabSource>();
         foreach (var source in cronsources)
         {
+            if (source.IsRealTime)
+            {
+                continue;
+            }
             var item = source.GetCrontabItem();
             fixedCrantabItems.Add(source.GetCrontabItem());
         }

src/Infrastructure/BotSharp.Core.Crontab/Services/CrontabWatcher.cs

@@ -45,7 +45,6 @@ private async Task RunCronChecker(IServiceProvider services)
     {
         var cron = services.GetRequiredService<ICrontabService>();
         var crons = await cron.GetCrontable();
-
         var publisher = services.GetService<IEventPublisher>();
 
         foreach (var item in crons)