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/Building.cs

@@ -1,13 +1,14 @@
 using System;
 using Unity.Netcode;
 using UnityEngine;
+using Northbound.Data;
 
 namespace Northbound
 {
     public class Building : NetworkBehaviour, IDamageable, IVisionProvider, ITeamMember
     {
         [Header("References")]
-        public BuildingData buildingData;
+        public TowerData buildingData;
 
         [Header("Runtime Info")]
         public Vector3Int gridPosition;
@@ -152,7 +153,7 @@ namespace Northbound
         /// <summary>
         /// 건물 초기화 (BuildingManager가 동적 생성 시 호출)
         /// </summary>
-        public void Initialize(BuildingData data, Vector3Int gridPos, int rot, ulong ownerId, TeamType team = TeamType.Player)
+        public void Initialize(TowerData data, Vector3Int gridPos, int rot, ulong ownerId, TeamType team = TeamType.Player)
         {
             buildingData = data;
             gridPosition = gridPos;
@@ -462,7 +463,7 @@ namespace Northbound
         #region Grid Bounds
 
         /// <summary>
-        /// Gets the grid-based bounds (from BuildingData width/length/height)
+        /// Gets the grid-based bounds (from TowerData width/length/height)
         /// This is used for placement validation, NOT the actual collider bounds
         /// Bounds are slightly shrunk to allow adjacent buildings to touch
         /// </summary>