İlk commit: Stepstead backend (FastAPI)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

cache.py

@@ -0,0 +1,16 @@
+import redis.asyncio as aioredis
+
+from config import settings
+
+redis_client: aioredis.Redis = aioredis.from_url(
+    settings.REDIS_URL,
+    decode_responses=True,
+    health_check_interval=30,
+)
+
+
+async def ping() -> bool:
+    try:
+        return await redis_client.ping()
+    except Exception:
+        return False