docs: align consolidated solver workflow

phases/linear-static-3d-euler-beam/step16.md

@@ -10,16 +10,16 @@
 - `/AGENTS.md`
 - `/docs/ARCHITECTURE.md`
 - `/docs/ADR.md`
-- `/docs/requirements/linear-static-3d-euler-beam.md`
-- `/docs/formulations/3d-isoparametric-euler-beam-formulation.md`
-- `/docs/numerical-reviews/linear-static-3d-euler-beam-review.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/formulation.md`
+- `/docs/linear-static-3d-euler-beam/numerical-review.md`
+- `/docs/linear-static-3d-euler-beam/io.md`
+- `/docs/linear-static-3d-euler-beam/implementation-plan.md`
 - `/include/fesa/math/vector.hpp`
 - `/include/fesa/math/matrix.hpp`
 - `/include/fesa/model/model_types.hpp`
 - `/include/fesa/results/result_records.hpp`
-- `/docs/implementation-plans/linear-static-3d-euler-beam-implementation-report.md`
+- `/docs/linear-static-3d-euler-beam/implementation-report.md`
 
 ## 소유 파일
 
@@ -99,7 +99,7 @@ ctest --test-dir .harness/build -C Debug --output-on-failure
 1. formulation invariant/analytical tests를 먼저 작성해 RED를 확인한다.
 2. 가장 작은 kernel 구현으로 GREEN을 만들고 normalized tolerance를 그대로 적용한다.
 3. 수식/코드 component ordering을 대조하고 전체 MSVC x64 Debug VERIFY를 수행한다.
-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 16 section에 실제 RED/GREEN/VERIFY command, exit code,
    핵심 output과 변경 파일을 기록한다.
 5. Step 16을 `completed`로 갱신하고 element/recovery test evidence를 summary에 기록한다.