docs: align consolidated solver workflow

phases/linear-static-3d-euler-beam/step10.md

@@ -11,9 +11,9 @@
 - `/AGENTS.md`
 - `/docs/ARCHITECTURE.md`
 - `/docs/ADR.md`
-- `/docs/requirements/linear-static-3d-euler-beam.md`
-- `/docs/io-definitions/linear-static-3d-euler-beam-io.md`
-- `/docs/implementation-plans/linear-static-3d-euler-beam.md`
+- `/docs/linear-static-3d-euler-beam/requirements.md`
+- `/docs/linear-static-3d-euler-beam/io.md`
+- `/docs/linear-static-3d-euler-beam/implementation-plan.md`
 - `/include/fesa/core/source_identity.hpp`
 - `/include/fesa/core/status.hpp`
 - `/src/fesa/CMakeLists.txt`
@@ -89,7 +89,7 @@ ctest --test-dir .harness/build -C Debug --output-on-failure
 1. Domain tests를 먼저 추가하고 compile/test RED를 확인한다.
 2. 최소 semantic types와 immutable Domain ownership으로 GREEN을 만든다.
 3. full VERIFY와 public dependency direction을 확인한다.
-4. `/docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md`의
+4. `/docs/linear-static-3d-euler-beam/implementation-report.md`의
    Step 10 section에 실제 RED/GREEN/VERIFY command, exit code,
    핵심 output과 변경 파일을 기록한다.
 5. Step 10을 `completed`로 갱신하고 model types/stable identity를 summary에 기록한다.