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/UnityEngine/UnityShim.cs

@@ -342,6 +342,7 @@ namespace UnityEngine
     public class HideInInspector : Attribute { }
     public class ExecuteInEditMode : Attribute { }
     public class ExecuteAlwaysAttribute : Attribute { }
+    public class DisallowMultipleComponentAttribute : Attribute { }
     public class AndroidJavaObject : IDisposable { public AndroidJavaObject(string className, params object[] args) { } public T Call<T>(string method, params object[] args) => default; public void Call(string method, params object[] args) { } public T Get<T>(string name) => default; public void Set<T>(string name, T val) { } public void Dispose() { } }
     public class WebCamTexture : Texture { public WebCamTexture() { } public WebCamTexture(int w, int h, int fps) { } public void Play() { } public void Stop() { } public bool isPlaying => false; public Color32[] GetPixels32() => new Color32[0]; }
     public class AddComponentMenu : Attribute { public AddComponentMenu(string n) { } public AddComponentMenu(string n, int o) { } }