Order and return consolidation fixture

This is a synthetic console demonstration with intentional duplication. It is not a payment system or a security reference implementation.

dotnet build ECommerceOrderAndReturn.csproj -m:1 -p:UseSharedCompilation=false
dotnet run --no-build --project ECommerceOrderAndReturn.csproj

Inspect OrderProcessor, ReturnProcessor and their services. Preserve their distinct prefixes, shipping thresholds and inventory directions. Orders over 50 receive a one-unit shipping discount in this implementation; the code does not implement free shipping at that threshold.

EXPECTED_OUTPUT.md is a historical illustration with dynamic timestamps. Capture your own baseline. The processors catch and log exceptions, so the demo’s exit status alone is not a discriminating test. Add assertions for the behavior you refactor, including equality boundaries and side effects.