{"message":"Kafka → WebSocket/SSE gateway","ws":"/ws?asset=BTC-PERP&exchange=okx","sse":"/sse?asset=BTC-PERP&exchange=okx","ws_batched":"/ws/batched?batch_size=5&asset=BTC-PERP","sse_batched":"/sse/batched?batch_size=5&asset=BTC-PERP","health":"/healthz","docs":"/docs"}