Real-time Cryptocurrency Price Server
        =====================================
        
        WebSocket Endpoint: ws://localhost:3002
        
        Subscribe to price updates:
        {
          "type": "subscribe",
          "channel": "live_data_points",
          "event": "UPDATE",
          "schema": "public",
          "table": "live_data_points",
          "filter": "provider_asset=in.(bitcoin,ethereum,solana)"
        }
        
        Unsubscribe:
        {
          "type": "unsubscribe",
          "channel": "live_data_points"
        }
        
        Health Check: GET /health
        Statistics: GET /stats