Python WebSocket Implementation

Create a WebSocket implementation for: [DESCRIBE YOUR REAL-TIME NEEDS]

Requirements:
- Server framework: [FASTAPI/DJANGO CHANNELS/STANDALONE]
- Client type: [PYTHON/BROWSER/BOTH]
- Message format: [JSON/BINARY]
- Features: [CHAT/NOTIFICATIONS/STREAMING]

Provide:
1. WebSocket server setup
2. Connection handling
3. Message broadcasting
4. Room/channel management
5. Authentication
6. Heartbeat/ping-pong
7. Reconnection logic
8. Client implementation
9. Error handling
10. Scaling considerations
11. Testing WebSockets
12. Production deployment