feat(528): 신규 프로젝트 그룹 공통 백엔드 — 종류 칸 · 산림청 판정 · D01 · E01 생성 API · 공유 GET 만 · 가입 go.kr = 산림청

- DB 020(추가만): projects 종류 · 사업연도 끝 · 설계속도 · 원본 칸 · plan_route_years · plan_route_assignees · 회사 「산림청」 행
- is_forest_email · is_forest_service · /api/auth/session 에 is_forest_service
- require_project_access 한 곳 — 지정 회사 = GET · HEAD 만 · 그 밖 403
- POST /api/d01/project(산림청만 · PLAN · 설계속도 기본 = resolve_design_speed) · GET /api/dashboard/plan-routes/assigned
- GET /api/e01/source-candidates · POST /api/e01/project(B06 완료만 · STABILITY · 원본 칸 · 자료 복사는 528-4)
- 종류별 단계 시드(PLAN 3 · STABILITY 4) · storage 허용 D0x · E0x · B01 목록에 project_kind
- 가입 인증 — 메일 *.go.kr = 회사 산림청 · ACTIVE · 화면 회사 칸 「산림청」 잠금 표시
- 지킴 시험 test_528_project_groups.py

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

main.py

@@ -72,6 +72,9 @@ from B08_Quantity.B08_Quantity_Router_Summary import router as b08_summary_route
 from B08_Quantity.B08_Quantity_Router_Material import router as b08_material_router
 from B08_Quantity.B08_Quantity_Router_Milestone import router as b08_milestone_router
 from B09_Estimation.B09_Estimation_Router import router as b09_estimation_router
+from D01_PlanRegister.D01_PlanRegister_Router import dashboard_router as d01_dashboard_router
+from D01_PlanRegister.D01_PlanRegister_Router import router as d01_plan_register_router
+from E01_StabRegister.E01_StabRegister_Router import router as e01_stab_register_router
 from M01_MasterData.M01_MasterData_Router import router as m01_master_data_router
 from M02_MasterTemplete.M02_Labor_Router import router as m02_labor_router
 from M02_MasterTemplete.M02_MasterTemplete_Router import router as m02_master_template_router
@@ -449,6 +452,10 @@ app.include_router(a09_security_router)
 app.include_router(b01_dashboard_router)
 app.include_router(b02_proj_register_router)
 protected = [Depends(verify_session)]
+# 신규 그룹 등록(요구 345) — 권한은 길 안에서(산림청 · 회사).
+app.include_router(d01_plan_register_router, dependencies=protected)
+app.include_router(d01_dashboard_router, dependencies=protected)
+app.include_router(e01_stab_register_router, dependencies=protected)
 # 프로젝트 경로가 붙는 라우터는 그 프로젝트가 내 회사 것인지도 함께 본다
 # (2026-09-01 — 지금까지 id만 알면 남의 회사 자료에 닿았다).
 protected_with_company = [