agent: set origin during PQ execution

command/agent/dns.go

@@ -592,6 +592,7 @@ RPC:
 func (d *DNSServer) preparedQueryLookup(network, datacenter, query string, req, resp *dns.Msg) {
 	// Execute the prepared query.
 	args := structs.PreparedQueryExecuteRequest{
+		Origin:        d.agent.config.NodeName,
 		Datacenter:    datacenter,
 		QueryIDOrName: query,
 		QueryOptions: structs.QueryOptions{

command/agent/prepared_query_endpoint.go

@@ -95,6 +95,7 @@ func parseLimit(req *http.Request, limit *int) error {
 // preparedQueryExecute executes a prepared query.
 func (s *HTTPServer) preparedQueryExecute(id string, resp http.ResponseWriter, req *http.Request) (interface{}, error) {
 	args := structs.PreparedQueryExecuteRequest{
+		Origin:        s.agent.config.NodeName,
 		QueryIDOrName: id,
 	}
 	s.parseSource(req, &args.Source)