Restructure into full project layout

backend/app/core/redis.py

@@ -0,0 +1,11 @@
+import redis.asyncio as redis
+from app.core.config import settings
+
+_redis = None
+
+
+async def get_redis():
+    global _redis
+    if _redis is None:
+        _redis = redis.from_url(settings.REDIS_URL, decode_responses=True)
+    return _redis