build NestJob -> resolve engine by name -> Solve -> independent
NestLayoutCheck validation -> bind placements to caller drawings.
The pipeline never commits to plates and never mutates caller items;
validation failures are returned as messages naming real drawings
(unknown-requirement placements are reported, not dropped). Console,
MCP, API and desktop Auto Nest will adopt this path in later phases.
- NestPipeline.Run(request): registry-resolved engine, unknown names
list the registered engines; cancellation propagates untouched.
- NestPipeline.Run(engine, ...): stub/plug-in engines take the same path.
- NestResultBinder: pose semantics identical to NestResultMaterializer.
- NestLayoutCheck: Violations overload with per-requirement display names.
Tests: overlap stub -> violations w/ drawing names, no throw; ghost
placement -> violation + excluded from further checks; unknown engine
-> NotSupportedException listing engines; cancelled token -> no result;
happy path -> bound by reference, caller quantity untouched.
aj