Initial commit: RSS platform phase 1 skeleton with code review fixes

Features:
- FastAPI + SQLAlchemy 2.0 async + PostgreSQL/pgvector + Redis backend
- Vue 3 + TypeScript + Element Plus frontend
- JWT auth with access/refresh tokens and revocation
- Admin/member RBAC
- RSS feed CRUD and article listing
- Settings management with Fernet encryption for sensitive values
- Redis distributed lock service
- Alembic initial migration
- Docker Compose development environment

Fixes from code review:
- Fix DB session leak in dependency injection
- Restrict registration to admin only
- Add default admin password warning
- Implement JWT refresh tokens and jti blacklist
- Strengthen password policy
- Use func.count for pagination totals
- Replace NullPool with AsyncAdaptedQueuePool
- Remove init_db from lifespan to enforce alembic migrations
- Add request_id middleware and logging filter
- Fix vite.config.ts env loading
- Add frontend token refresh interceptor
- Add Vue error handler

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

backend/app/api/v1/health.py

@@ -0,0 +1,52 @@
+"""Health check router."""
+from fastapi import APIRouter, Depends, Request
+from sqlalchemy import text
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.api.deps import get_current_admin, get_db
+from app.core.redis import check_redis_health
+
+router = APIRouter(prefix="/health", tags=["health"])
+
+
+@router.get("")
+async def health_check(request: Request, db: AsyncSession = Depends(get_db)):
+    """Basic health check."""
+    db_ok = False
+    try:
+        await db.execute(text("SELECT 1"))
+        db_ok = True
+    except Exception:
+        db_ok = False
+
+    redis_ok = await check_redis_health()
+
+    status_code = "ok" if db_ok and redis_ok else "degraded"
+
+    response = {
+        "status": status_code,
+        "service": "rss-platform",
+        "db": "ok" if db_ok else "error",
+        "redis": "ok" if redis_ok else "error",
+    }
+    warnings = getattr(request.app.state, "startup_warnings", None)
+    if warnings:
+        response["warnings"] = warnings
+    return response
+
+
+@router.get("/db", dependencies=[Depends(get_current_admin)])
+async def db_health(db: AsyncSession = Depends(get_db)):
+    """Database health check."""
+    try:
+        await db.execute(text("SELECT 1"))
+        return {"status": "ok", "component": "database"}
+    except Exception as exc:
+        return {"status": "error", "component": "database", "detail": str(exc)}
+
+
+@router.get("/redis", dependencies=[Depends(get_current_admin)])
+async def redis_health():
+    """Redis health check."""
+    ok = await check_redis_health()
+    return {"status": "ok" if ok else "error", "component": "redis"}