Refactor Phase 2: Split stories.py into Schema/Service/Controller, add missing endpoints, fix async bug

backend/app/core/redis.py

@@ -0,0 +1,25 @@
+"""Redis client module."""
+
+from typing import AsyncGenerator
+
+from redis.asyncio import Redis, from_url
+
+from app.core.config import settings
+
+_redis_pool: Redis | None = None
+
+
+async def get_redis() -> Redis:
+    """Get global Redis client instance."""
+    global _redis_pool
+    if _redis_pool is None:
+        _redis_pool = from_url(settings.redis_url, encoding="utf-8", decode_responses=True)
+    return _redis_pool
+
+
+async def close_redis():
+    """Close Redis connection."""
+    global _redis_pool
+    if _redis_pool:
+        await _redis_pool.close()
+        _redis_pool = None