Move activeConnections to Server

src/server.cpp

@@ -17,8 +17,6 @@
 #include <unistd.h>
 #include <vector>
 
-extern std::atomic<int> activeConnections;
-
 std::shared_ptr<Server> Server::create(const weaseldb::Config &config,
                                        ConnectionHandler &handler) {
   // Use std::shared_ptr constructor with private access
@@ -407,7 +405,7 @@ void Server::start_io_threads(std::vector<std::thread> &threads) {
 
             // Check connection limit
             if (config_.server.max_connections > 0 &&
-                activeConnections.load(std::memory_order_relaxed) >=
+                active_connections_.load(std::memory_order_relaxed) >=
                     config_.server.max_connections) {
               close(fd);
               continue;