Order-processing refactoring fixture

The synthetic console app demonstrates validation, inventory, payment, shipping, notifications and audit behavior. Its long application-core method is the exercise target, not a reference for production payment handling.

dotnet build src/ECommerce.Console/ECommerce.Console.csproj -m:1 -p:UseSharedCompilation=false
dotnet run --no-build --project src/ECommerce.Console/ECommerce.Console.csproj

Run from the copied fixture root and inspect the generated audit file there. Record the actual behavior before extraction; date-sensitive sample values and historical console text are not current acceptance evidence.

Use the architecture comparison to record preservation of compensation and side effects. A short method and successful build do not prove it.