moved parameter_binder from member to parameter to bind, execute and fetch methods

source/orm/sql/statement_cache.cpp

@@ -10,11 +10,11 @@ public:
   explicit statement_cache_proxy(std::unique_ptr<statement_impl>&& stmt)
   : statement_proxy(std::move(stmt)) {}
 
-  utils::result<size_t, utils::error> execute() override {
-    return statement_->execute();
+  utils::result<size_t, utils::error> execute(interface::parameter_binder& bindings) override {
+    return statement_->execute(bindings);
   }
-  utils::result<std::unique_ptr<query_result_impl>, utils::error> fetch() override {
-    return statement_->fetch();
+  utils::result<std::unique_ptr<query_result_impl>, utils::error> fetch(interface::parameter_binder& bindings) override {
+    return statement_->fetch(bindings);
   }
 };
 
@@ -43,8 +43,8 @@ utils::result<statement, utils::error> statement_cache::acquire(const query_cont
 
   // If cache max size reached ensure space
   if (cache_map_.size() >= max_size_) {
-    const size_t& lru_key = usage_list_.back();
-    cache_map_.erase(lru_key);
+    const auto& key_to_remove = usage_list_.back();
+    cache_map_.erase(key_to_remove);
     usage_list_.pop_back();
   }