Support player sessions in admin logs and add test

Fix EventRan log type id
Make slipping low impact

Content.Server/Administration/Logs/Converters/PlayerSessionConverter.cs

@@ -0,0 +1,33 @@
+using System.Text.Json;
+using Robust.Server.Player;
+
+namespace Content.Server.Administration.Logs.Converters;
+
+[AdminLogConverter]
+public class PlayerSessionConverter : AdminLogConverter<SerializablePlayer>
+{
+    public override void Write(Utf8JsonWriter writer, SerializablePlayer value, JsonSerializerOptions options)
+    {
+        writer.WriteStartObject();
+
+        if (value.Player.AttachedEntity != null)
+        {
+            writer.WriteNumber("id", (int) value.Player.AttachedEntity.Uid);
+            writer.WriteString("name", value.Player.AttachedEntity.Name);
+        }
+
+        writer.WriteString("player", value.Player.UserId.UserId);
+
+        writer.WriteEndObject();
+    }
+}
+
+public readonly struct SerializablePlayer
+{
+    public readonly IPlayerSession Player;
+
+    public SerializablePlayer(IPlayerSession player)
+    {
+        Player = player;
+    }
+}