minor: yugioh support added

core/include/ccm/infra/CprHttpClient.hpp

@@ -7,17 +7,31 @@
 #include "ccm/ports/IHttpClient.hpp"
 
 #include <chrono>
+#include <memory>
+#include <mutex>
+
+namespace cpr { class Session; }
 
 namespace ccm {
 
+// Concrete IHttpClient backed by libcpr/libcurl. The single owned
+// `cpr::Session` keeps libcurl's connection pool alive across calls, so
+// repeat HTTPS requests to the same host (api.scryfall.com, yugipedia.com,
+// ms.yugipedia.com, …) reuse the existing TLS connection instead of paying
+// for a fresh handshake every time. Concurrent calls are serialized through
+// a mutex - libcurl easy handles are not thread-safe, and the preview path
+// only fires one outbound request at a time anyway.
 class CprHttpClient final : public IHttpClient {
 public:
     explicit CprHttpClient(std::chrono::milliseconds timeout = std::chrono::milliseconds{30000});
+    ~CprHttpClient() override;
 
     Result<std::string> get(std::string_view url) override;
 
 private:
     std::chrono::milliseconds timeout_;
+    std::unique_ptr<cpr::Session> session_;
+    std::mutex sessionMutex_;
 };
 
 }  // namespace ccm