Sleeper agents event no longer occurs when evacuation is called (#30646)

no more evac sleeper agents

Content.Server/StationEvents/EventManagerSystem.cs

@@ -1,6 +1,7 @@
 using System.Linq;
 using Content.Server.Chat.Managers;
 using Content.Server.GameTicking;
+using Content.Server.RoundEnd;
 using Content.Server.StationEvents.Components;
 using Content.Shared.CCVar;
 using Robust.Server.Player;
@@ -18,6 +19,7 @@ public sealed class EventManagerSystem : EntitySystem
     [Dependency] private readonly IPrototypeManager _prototype = default!;
     [Dependency] private readonly IChatManager _chat = default!;
     [Dependency] public readonly GameTicker GameTicker = default!;
+    [Dependency] private readonly RoundEndSystem _roundEnd = default!;
 
     public bool EventsEnabled { get; private set; }
     private void SetEnabled(bool value) => EventsEnabled = value;
@@ -191,6 +193,11 @@ public sealed class EventManagerSystem : EntitySystem
             return false;
         }
 
+        if (_roundEnd.IsRoundEndRequested() && !stationEvent.OccursDuringRoundEnd)
+        {
+            return false;
+        }
+
         return true;
     }
 }