Check SRM functionality on D678 with crop_rec_4k code

[reticulatedpines]

crop_rec_4k_mlv_snd turns out to be another important branch that we want code from. In the normal pattern for ML development, this branch contains several different features, most unrelated to the branch name.

One such feature is changes to SRM allocator code, which look more tested / advanced than lua_fix branch. We should validate if D678 is still broken around SRM with this code.