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>

Makefile

@@ -0,0 +1,45 @@
+.PHONY: help dev up down build migrate test lint format clean
+
+help:
+	@echo "RSS Platform 开发命令:"
+	@echo "  make dev      - 启动开发环境 (docker-compose up -d)"
+	@echo "  make up       - 启动服务"
+	@echo "  make down     - 停止服务"
+	@echo "  make build    - 重新构建镜像"
+	@echo "  make migrate  - 执行数据库迁移"
+	@echo "  make test     - 运行后端测试"
+	@echo "  make lint     - 代码检查"
+	@echo "  make format   - 代码格式化"
+	@echo "  make clean    - 清理容器与数据卷"
+
+dev: up migrate
+	@echo "开发环境已启动"
+	@echo "后端: http://localhost:8000"
+	@echo "前端: http://localhost:5173"
+
+up:
+	docker-compose up -d
+
+down:
+	docker-compose down
+
+build:
+	docker-compose build
+
+migrate:
+	docker-compose exec backend alembic upgrade head
+
+test:
+	docker-compose exec backend pytest tests/ -v
+
+lint:
+	docker-compose exec backend ruff check app tests
+
+format:
+	docker-compose exec backend ruff format app tests
+
+clean:
+	docker-compose down -v
+	find . -type d -name __pycache__ -exec rm -rf {} +
+	find . -type d -name node_modules -exec rm -rf {} +
+	find . -type d -name .pytest_cache -exec rm -rf {} +