feat: add Redis configuration and dependency for improved caching

- Updated .env.example to include REDIS_URL for Redis connection.
- Added radis version 2.0.0 to dependencies in package.json.
- Updated pnpm-lock.yaml to reflect the addition of the radis dependency and its resolution details.

Author: betterhyq

.env.example

@@ -1,3 +1,4 @@
 LLM_API_URL=http://api.chatrhino.jd.com/api/v2
 LLM_API_KEY=your-joyai-api-key
 LLM_MODEL=Chatrhino-81B-Pro
+REDIS_URL="redis://default:xxx:10637"

package.json

@@ -38,6 +38,7 @@
     "eslint": "9.39.3",
     "eslint-config-next": "16.1.6",
     "postcss": "8.5.6",
+    "radis": "2.0.0",
     "tailwindcss": "4.2.1",
     "typescript": "5.9.3"
   }