fix: TileRegistry floor-range warning, GroupViewsByFloor tests, stopwatch cleanup

Assets/Scripts/Infrastructure/Unity/TileRegistry.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using Core.Domain;
+using UnityEngine;
 
 namespace Infrastructure.Unity
 {
@@ -30,7 +31,12 @@ namespace Infrastructure.Unity
 
             foreach (var tile in _tiles)
             {
-                if (tile.Floor < floorCount && _views.TryGetValue(tile.Id, out var view))
+                if (tile.Floor >= floorCount)
+                {
+                    Debug.LogWarning($"TileRegistry: tile '{tile.Id}' floor {tile.Floor} >= floorCount {floorCount}, skipping");
+                    continue;
+                }
+                if (_views.TryGetValue(tile.Id, out var view))
                     floors[tile.Floor].Add(view);
             }