feat: 최대 강화 단계, 현재 골드 기반 랭크 추가

include/DatabaseManager.h

@@ -19,11 +19,25 @@ public:
     std::string nickname;
     uint64_t gold;
     uint32_t swordLevel;
+    uint32_t maxSwordLevel;
+  };
+
+  struct RankingResult {
+    struct Entry {
+      uint32_t rank;
+      std::string nickname;
+      uint64_t value;
+    };
+    std::vector<Entry> topEntries;
+    int32_t myRank;
+    uint64_t myValue;
   };
 
   boost::asio::awaitable<UserData> LoadUser(std::string nickname);
   boost::asio::awaitable<void> SaveUser(std::string nickname, uint64_t gold,
                                         uint32_t swordLevel);
+  boost::asio::awaitable<RankingResult> GetRanking(int type,
+                                                   std::string nickname);
 
 private:
   DatabaseManager() = default;