업그레이드 데이터 입력 로직 및 기능 추가

캐릭터 스탯을 PlayerStats 컴포넌트에서 모아서 관리하도록 변경
코드에서도 마찬가지

Assets/Scripts/UpgradeDatabase.cs

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+using System.Collections.Generic;
+using UnityEngine;
+using Northbound.Data;
+
+namespace Northbound
+{
+    /// <summary>
+    /// 업그레이드 데이터를 자동으로 로드하고 관리하는 싱글톤
+    /// Resources 폴더에서 모든 UpgradeData를 자동으로 로드
+    /// </summary>
+    public class UpgradeDatabase : MonoBehaviour
+    {
+        private static UpgradeDatabase _instance;
+        public static UpgradeDatabase Instance => _instance;
+
+        // Resources에서 자동 로드된 데이터
+        private List<UpgradeData> _upgradeDataList = new List<UpgradeData>();
+
+        // 조회용 딕셔너리
+        private Dictionary<int, UpgradeData> _upgradeById = new Dictionary<int, UpgradeData>();
+        private Dictionary<string, List<UpgradeData>> _upgradesByCategory = new Dictionary<string, List<UpgradeData>>();
+
+        // Resources 경로
+        private const string UPGRADE_RESOURCES_PATH = "Data/ScriptableObjects/Upgrade";
+
+        private void Awake()
+        {
+            if (_instance != null && _instance != this)
+            {
+                Destroy(gameObject);
+                return;
+            }
+
+            _instance = this;
+            LoadUpgradeData();
+            BuildLookupTables();
+        }
+
+        /// <summary>
+        /// Resources에서 모든 UpgradeData 자동 로드
+        /// </summary>
+        private void LoadUpgradeData()
+        {
+            _upgradeDataList.Clear();
+
+            var upgrades = Resources.LoadAll<UpgradeData>(UPGRADE_RESOURCES_PATH);
+            _upgradeDataList.AddRange(upgrades);
+
+            Debug.Log($"[UpgradeDatabase] {_upgradeDataList.Count}개의 업그레이드 데이터를 로드했습니다.");
+        }
+
+        /// <summary>
+        /// 조회용 테이블 구축
+        /// </summary>
+        private void BuildLookupTables()
+        {
+            _upgradeById.Clear();
+            _upgradesByCategory.Clear();
+
+            foreach (var upgrade in _upgradeDataList)
+            {
+                if (upgrade == null) continue;
+
+                // ID로 조회
+                if (!_upgradeById.ContainsKey(upgrade.id))
+                {
+                    _upgradeById[upgrade.id] = upgrade;
+                }
+
+                // 카테고리로 조회
+                string category = upgrade.upgradeCategory;
+                if (!_upgradesByCategory.ContainsKey(category))
+                {
+                    _upgradesByCategory[category] = new List<UpgradeData>();
+                }
+                _upgradesByCategory[category].Add(upgrade);
+            }
+        }
+
+        /// <summary>
+        /// 데이터 다시 로드 (에디터에서 데이터 변경 시 호출)
+        /// </summary>
+        public void ReloadData()
+        {
+            LoadUpgradeData();
+            BuildLookupTables();
+        }
+
+        #region Getters
+
+        /// <summary>
+        /// ID로 업그레이드 데이터 조회
+        /// </summary>
+        public UpgradeData GetUpgradeById(int id)
+        {
+            if (_upgradeById.TryGetValue(id, out var upgrade))
+            {
+                return upgrade;
+            }
+            Debug.LogWarning($"[UpgradeDatabase] ID {id}에 해당하는 업그레이드를 찾을 수 없습니다.");
+            return null;
+        }
+
+        /// <summary>
+        /// 카테고리로 업그레이드 목록 조회
+        /// </summary>
+        public List<UpgradeData> GetUpgradesByCategory(string category)
+        {
+            if (_upgradesByCategory.TryGetValue(category, out var upgrades))
+            {
+                return new List<UpgradeData>(upgrades);
+            }
+            return new List<UpgradeData>();
+        }
+
+        /// <summary>
+        /// 개인 업그레이드 목록 조회
+        /// </summary>
+        public List<UpgradeData> GetPersonalUpgrades()
+        {
+            var result = new List<UpgradeData>();
+            foreach (var upgrade in _upgradeDataList)
+            {
+                if (upgrade != null && upgrade.upgradeTarget == "person")
+                {
+                    result.Add(upgrade);
+                }
+            }
+            return result;
+        }
+
+        /// <summary>
+        /// 팀 업그레이드 목록 조회
+        /// </summary>
+        public List<UpgradeData> GetTeamUpgrades()
+        {
+            var result = new List<UpgradeData>();
+            foreach (var upgrade in _upgradeDataList)
+            {
+                if (upgrade != null && upgrade.upgradeTarget == "share")
+                {
+                    result.Add(upgrade);
+                }
+            }
+            return result;
+        }
+
+        /// <summary>
+        /// 모든 업그레이드 데이터 반환
+        /// </summary>
+        public List<UpgradeData> GetAllUpgrades()
+        {
+            return new List<UpgradeData>(_upgradeDataList);
+        }
+
+        /// <summary>
+        /// 선행 업그레이드 조건 충족 여부 확인
+        /// </summary>
+        public bool ArePrerequisitesMet(int upgradeId, HashSet<int> ownedUpgradeIds)
+        {
+            var upgrade = GetUpgradeById(upgradeId);
+            if (upgrade == null) return false;
+
+            foreach (int requiredId in upgrade.requireUpgradeId)
+            {
+                if (!ownedUpgradeIds.Contains(requiredId))
+                {
+                    return false;
+                }
+            }
+
+            return true;
+        }
+
+        #endregion
+    }
+}