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/core/logging.py

@@ -0,0 +1,40 @@
+"""Logging configuration."""
+import logging
+import sys
+from contextvars import ContextVar
+
+request_id_var: ContextVar[str] = ContextVar("request_id", default="")
+
+
+def configure_logging(log_level: str = "INFO") -> None:
+    """Configure structured logging."""
+    handler = logging.StreamHandler(sys.stdout)
+    formatter = logging.Formatter(
+        "%(asctime)s - %(name)s - %(levelname)s - [%(request_id)s] %(message)s"
+    )
+    handler.setFormatter(formatter)
+    handler.addFilter(RequestIdFilter())
+
+    root_logger = logging.getLogger()
+    root_logger.setLevel(getattr(logging, log_level.upper(), logging.INFO))
+    root_logger.handlers = []
+    root_logger.addHandler(handler)
+
+    # Reduce noise from third-party libraries
+    logging.getLogger("sqlalchemy.engine").setLevel(logging.WARNING)
+    logging.getLogger("uvicorn.access").setLevel(logging.WARNING)
+
+
+class RequestIdFilter(logging.Filter):
+    """Inject request_id into log records."""
+
+    def filter(self, record: logging.LogRecord) -> bool:
+        record.request_id = request_id_var.get()  # type: ignore[attr-defined]
+        return True
+
+
+def get_logger(name: str) -> logging.Logger:
+    """Get a logger with request_id filter."""
+    logger = logging.getLogger(name)
+    logger.addFilter(RequestIdFilter())
+    return logger