check two-level scenario

[monkey0head]

• check for bugs/errors
• create jupyter notebook illustrating two-level scenario usage and optimisation

[AleXXL1986]

check for bugs/errors means that you should to execute it and check adequacy of results

[monkey0head]

• split scenario into stages (classes and functions) to be able to construct a pipeline from those stages (two-stages scenario with distributed lama) or use individually
• check each stage logic and look for bugs
• create notebook showing stages execution one-by-one and comparing quality metrics of two-stages and first-stage models