모델 업로드 구조 완성

impl/utils/generate_id.cpp

@@ -9,13 +9,15 @@ static struct EpochInitializer {
   std::chrono::system_clock::time_point EPOCH;
 } epochInitializer;
 
-Snowflake GenerateID() {
+Snowflake GenerateID(std::uint16_t instance) {
   static std::mutex snowflakeGenerateMutex_;
 
   std::lock_guard<std::mutex> lock(snowflakeGenerateMutex_);
 
   std::size_t tid =
       std::hash<std::thread::id>{}(std::this_thread::get_id());
+  instance = instance << 3;
+  tid += instance;
 
   thread_local static int sequence = 0;
   Snowflake id = {};