{
  "websocket_url": "wss://stream.bybit.com/v5/public/linear",
  "symbol": "BTCUSDT",
  "data_dir": "data",
  "log_file": "engine.log",
  "hot_retention_hours": 12,
  "feature_retention_days": 30,
  "writer_flush_interval_ms": 500,
  "writer_batch_size": 100,
  "tick_channel_buffer": 10000,
  "maintenance_interval_minutes": 60,
  "streams": {
    "trades": {
      "enabled": true,
      "hot_retention_hours": 12,
      "feature_retention_days": 30
    },
    "ticker": {
      "enabled": true,
      "hot_retention_hours": 24,
      "feature_retention_days": 30,
      "snapshot_interval_ms": 5000
    },
    "klines": {
      "enabled": true,
      "intervals": [
        "5",
        "15",
        "60"
      ],
      "short_retention_hours": 24,
      "long_retention_weeks": 4,
      "feature_retention_days": 30
    },
    "orderbook": {
      "enabled": true,
      "depth": 50,
      "snapshot_interval_ms": 5000,
      "hot_retention_hours": 6,
      "feature_retention_days": 30
    },
    "liquidations": {
      "enabled": true,
      "hot_retention_hours": 12,
      "feature_retention_days": 30
    }
  }
}