feat(battle-engine): AOT/SFB/Steam/DisallowMultiple + FriendDataBase.SetPlayerData

Clears the last type+header frontier (RoomInviteFriendColum override). Per F3 this
unmasks the remaining View/UI/god-object member bodies (~8k) -- the next grind is
pure member-surface growth, closure (~3242 files) now essentially complete.

SVSim.BattleEngine/Shim/View/StoryTitleStubs.cs

@@ -22,7 +22,14 @@ namespace Wizard.Story.ChapterSelection.SelectionProcessing.Main
     public class Parameter { }
 }
 
-namespace Wizard.UIFriend { public class Friend { public class PlayerData { } } }
+namespace Wizard.UIFriend
+{
+    public class Friend { public class PlayerData { } }
+    public class FriendDataBase
+    {
+        public virtual void SetPlayerData(Friend.PlayerData in_PlayerData, System.Collections.Generic.List<string> in_LoadList) { }
+    }
+}
 namespace Wizard.Title { public class GameSetup { } }
 namespace Wizard.RoomMatch { public class Player { } }