Support player sessions in admin logs and add test

Fix EventRan log type id
Make slipping low impact

Content.Shared/Administration/Logs/LogType.cs

@@ -10,7 +10,7 @@ public enum LogType
     Slip = 4,
     EventAnnounced = 5,
     EventStarted = 6,
-    EventRan = 6,
+    EventRan = 16,
     EventStopped = 7,
     ShuttleCalled = 8,
     ShuttleRecalled = 9,

Content.Shared/Slippery/SharedSlipperySystem.cs

@@ -100,7 +100,7 @@ namespace Content.Shared.Slippery
 
             PlaySound(component);
 
-            _adminLog.Add(LogType.Slip, $"{component.Owner} slipped on collision with {otherBody.Owner}");
+            _adminLog.Add(LogType.Slip, LogImpact.Low, $"{component.Owner} slipped on collision with {otherBody.Owner}");
 
             return true;
         }