Ensure getPublishedSources includes ws.op

src/archive.cpp

@@ -176,6 +176,7 @@ std::generator<source_package_publishing_history> archive::getPublishedSources(
         {"status", !status.empty() ? status : ""},
         {"version", !version.empty() ? version : ""}
     };
+    params["ws.op"] = "getPublishedSources";
 
     // Remove empty entries
     for (auto it = params.begin(); it != params.end(); ) {