Generate UUID primary key on Database side (or using 3rd party Nuget package)

[kolosovpetro]

Taking to attention issues

• [API Proposal]: Uuid data type dotnet/runtime#86084
• Read/Write Big/LittleEndian support for Guid dotnet/runtime#86798

It is clear that Guid.NewGuid() method is not fit as primary key (at least in last its implementation), so we need to move UUID generation to database side or using nuget package

• https://github.com/vanbukin/Uuids