add documentation

src/actsim_agent/task_interface.cpp

@@ -168,6 +168,8 @@ void TaskInterface::decrement_design(const db::uuid_t& id) {
     if (design_entry.first == 0) {
         DEBUG_PRINT("Reference counter has hit 0. Deleting temp file from disk...");
 
+        // delete the temporary file from disk
+        DEBUG_PRINT("Deleting design file from disk.");
         std::remove(design_entry.second.c_str());
 
         DEBUG_PRINT("Erasing design from store.");