refactor(B05,B06): B05_wf2_Route -> B05_Profile, B06_wf3_ProfileCross -> B06_Section 동시 개명

- 한몸으로 동작하는 두 페이지라 한 커밋으로 처리 (상호 참조 다수)
- B05 37파일 + B06 20파일 접두사 개명 (git mv, 이력 보존)
- 참조 치환 91파일: import 경로, 라우트 슬러그(b05-profile/b06-section),
  라우트 키(B05_PROFILE/B06_SECTION), B03 자동 체인, storage 상수, pyproject 제외 경로
- 로직 변경 없음. typecheck·백엔드 import 검증 통과

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

B03_FileInput/B03_FileInput_Service_Chain.py

@@ -59,10 +59,10 @@ async def run_auto_design_chain(project_id: UUID, surface_model_id: int | None =
     예외를 밖으로 던지지 않는다 — 로그와 각 단계의 workflow 상태 기록으로 남긴다.
     """
     from B03_FileInput.B03_FileInput_Repository import get_project_storage_relative_path
-    from B05_wf2_Route.B05_wf2_Route_Repository import get_latest_route
-    from B05_wf2_Route.B05_wf2_Route_Router import confirm_latest_route, solve_route
-    from B05_wf2_Route.B05_wf2_Route_Schema import RoutePoint, RouteSolveRequest
-    from B06_wf3_ProfileCross.B06_wf3_ProfileCross_Router_Confirm import confirm_sections
+    from B05_Profile.B05_Profile_Repository import get_latest_route
+    from B05_Profile.B05_Profile_Router import confirm_latest_route, solve_route
+    from B05_Profile.B05_Profile_Schema import RoutePoint, RouteSolveRequest
+    from B06_Section.B06_Section_Router_Confirm import confirm_sections
     from common_util.common_util_storage import resolve_stored_project_path
     from common_util.common_util_surface_confirmation import surface_confirmation_defaults
     from config.config_db import get_db_pool
@@ -167,16 +167,16 @@ async def run_redesign_chain(
     경로가 아예 없으면 신규 자동 체인(계획노선 CSV 기본값)으로 되돌아간다.
     """
     from B03_FileInput.B03_FileInput_Repository import get_project_storage_relative_path
-    from B05_wf2_Route.B05_wf2_Route_Repository import get_latest_route
-    from B05_wf2_Route.B05_wf2_Route_Router import confirm_latest_route, solve_route
-    from B05_wf2_Route.B05_wf2_Route_Schema import RouteSolveRequest
-    from B06_wf3_ProfileCross.B06_wf3_ProfileCross_Repository import (
+    from B05_Profile.B05_Profile_Repository import get_latest_route
+    from B05_Profile.B05_Profile_Router import confirm_latest_route, solve_route
+    from B05_Profile.B05_Profile_Schema import RouteSolveRequest
+    from B06_Section.B06_Section_Repository import (
         get_cross_section_designs,
         get_longitudinal_section,
         update_cross_section_design,
     )
-    from B06_wf3_ProfileCross.B06_wf3_ProfileCross_Router_Confirm import confirm_sections
-    from B06_wf3_ProfileCross.B06_wf3_ProfileCross_Schema import SectionConfirmRequest
+    from B06_Section.B06_Section_Router_Confirm import confirm_sections
+    from B06_Section.B06_Section_Schema import SectionConfirmRequest
     from common_util.common_util_workflow_state import get_workflow_state
     from config.config_db import get_db_pool