feat: 웹사이트 표준화 검사 도구 구현

- 4개 검사 엔진: HTML/CSS, 접근성(WCAG), SEO, 성능/보안 (총 50개 항목)
- FastAPI 백엔드 (9개 API, SSE 실시간 진행, PDF/JSON 리포트)
- Next.js 15 프론트엔드 (6개 페이지, 29개 컴포넌트, 반원 게이지 차트)
- Docker Compose 배포 (Backend:8011, Frontend:3011, MongoDB:27022, Redis:6392)
- 전체 테스트 32/32 PASS

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/app/routers/reports.py

@@ -0,0 +1,81 @@
+"""
+Reports router.
+Handles PDF and JSON report download.
+"""
+
+import logging
+
+from fastapi import APIRouter, HTTPException
+from fastapi.responses import Response
+
+from app.core.database import get_db
+from app.core.redis import get_redis
+from app.services.inspection_service import InspectionService
+from app.services.report_service import ReportService
+
+logger = logging.getLogger(__name__)
+
+router = APIRouter()
+report_service = ReportService()
+
+
+def _get_inspection_service() -> InspectionService:
+    """Get InspectionService instance."""
+    db = get_db()
+    redis = get_redis()
+    return InspectionService(db=db, redis=redis)
+
+
+@router.get("/inspections/{inspection_id}/report/pdf")
+async def download_pdf(inspection_id: str):
+    """Download inspection report as PDF."""
+    service = _get_inspection_service()
+    inspection = await service.get_inspection(inspection_id)
+
+    if inspection is None:
+        raise HTTPException(
+            status_code=404,
+            detail="검사 결과를 찾을 수 없습니다",
+        )
+
+    try:
+        pdf_bytes = await report_service.generate_pdf(inspection)
+    except RuntimeError as e:
+        raise HTTPException(
+            status_code=500,
+            detail=str(e),
+        )
+
+    filename = report_service.generate_filename(inspection.get("url", "unknown"), "pdf")
+
+    return Response(
+        content=pdf_bytes,
+        media_type="application/pdf",
+        headers={
+            "Content-Disposition": f'attachment; filename="{filename}"',
+        },
+    )
+
+
+@router.get("/inspections/{inspection_id}/report/json")
+async def download_json(inspection_id: str):
+    """Download inspection report as JSON file."""
+    service = _get_inspection_service()
+    inspection = await service.get_inspection(inspection_id)
+
+    if inspection is None:
+        raise HTTPException(
+            status_code=404,
+            detail="검사 결과를 찾을 수 없습니다",
+        )
+
+    json_bytes = await report_service.generate_json(inspection)
+    filename = report_service.generate_filename(inspection.get("url", "unknown"), "json")
+
+    return Response(
+        content=json_bytes,
+        media_type="application/json",
+        headers={
+            "Content-Disposition": f'attachment; filename="{filename}"',
+        },
+    )