건설 인터랙션 관련 버그 수정 및 건설 데이터 구조 개선

건설 인터랙션 시 움직이지 못하는 문제 수정
2개로 분리되어 있던 타워 데이터를 하나로 통합
 - 대신 타워가 아닌 건물도 공격력 등을 정의할 수 있음

Assets/Scripts/Editor/CSVToSOImporter.cs

@@ -123,10 +123,9 @@ namespace Northbound.Editor
             }
 
             // If towers were imported, auto-configure BuildingManager
-            // TowerData now extends BuildingData, so it can be used directly!
             if (typeName == "Tower")
             {
-                Debug.Log($"<color=cyan>[CSVToSOImporter] Tower import complete, TowerData extends BuildingData now!</color>");
+                Debug.Log($"<color=cyan>[CSVToSOImporter] Tower import complete!</color>");
             }
 
             return true;
@@ -203,10 +202,10 @@ namespace Northbound.Editor
             }
 
             // Now set the prefab reference on data
-            if (data is BuildingData buildingData)
+            if (data is TowerData towerData)
             {
-                buildingData.prefab = prefabObj;
-                Debug.Log($"[CSVToSOImporter] Set prefab reference: {buildingData.name} -> {prefabObj.name}");
+                towerData.prefab = prefabObj;
+                Debug.Log($"[CSVToSOImporter] Set prefab reference: {towerData.name} -> {prefabObj.name}");
             }
 
             // Save data asset
@@ -236,9 +235,9 @@ namespace Northbound.Editor
                 return;
             }
 
-            // Load TowerData (which extends BuildingData)
+            // Load TowerData
             string[] towerDataGuids = AssetDatabase.FindAssets("t:TowerData", new[] { "Assets/Data/ScriptableObjects" });
-            List<BuildingData> allTowers = new List<BuildingData>();
+            List<TowerData> allTowers = new List<TowerData>();
 
             Debug.Log($"<color=cyan>[CSVToSOImporter] Found {towerDataGuids.Length} TowerData assets</color>");