The packed_t is used to pack bits together. However, it seems that perhaps std::bitset might do this better, and also offer more features, functions, etc. It might simplify the code!? and might? run faster?

Now the unit tests for the time series forecasting are quite formal and the low-quality predictions can still be fine in the test (because the benchmarks are too simple or the pass criteria are too weak).

It is necessary to implement a set of new quality-related tests for forecasting with atomic and composite models with a different structure.