Explicitly pass pkgconf to the lambda for source checks

cpp/web_server.cpp

@@ -222,8 +222,7 @@ bool WebServer::start_server(quint16 port) {
 
             task_queue->enqueue(
                 job_statuses->at("source_check"),
-                [this, proposed](std::shared_ptr<Log> log) mutable {
-                    std::shared_ptr<PackageConf> pkgconf = log->get_task_context()->get_parent_packageconf();
+                [this, pkgconf, proposed](std::shared_ptr<Log> log) mutable {
                     std::string package_version = pkgconf->upstream_version + "-0ubuntu0~ppa" + std::to_string(pkgconf->ppa_revision);
                     bool found_in_ppa = false;
                     for (auto spph : proposed.getPublishedSources("", "", std::nullopt, true, true, "", pkgconf->package->name, "", package_version)) {