feat: stop application when bot offline

Author: ProgramRipper

Lagrange.Milky/Event/EventService.cs

@@ -12,10 +12,12 @@
 
 namespace Lagrange.Milky.Event;
 
-public class EventService(ILogger<EventService> logger, IOptions<MilkyConfiguration> options, BotContext bot, EntityConvert convert) : IHostedService
+public class EventService(ILogger<EventService> logger, IHostApplicationLifetime lifetime, IOptions<MilkyConfiguration> options, BotContext bot, EntityConvert convert) : IHostedService
 {
     private readonly ILogger<EventService> _logger = logger;
 
+    private readonly IHostApplicationLifetime _lifetime = lifetime;
+
     private readonly bool _ignoreBotMessage = options.Value.Message.IgnoreBotMessage;
 
     private readonly BotContext _bot = bot;
@@ -55,6 +57,8 @@ private void HandleOfflineEvent(BotContext bot, LgrEvents.BotOfflineEvent @event
         {
             _logger.LogHandleEventException(nameof(LgrEvents.BotOfflineEvent), e);
         }
+
+        _lifetime.StopApplication();
     }
 
     private void HandleMessageEvent(BotContext bot, LgrEvents.BotMessageEvent @event)