fix: fallback to local timestamp for hyperliquid derivatvies ticker m…

…essages timestamp field

src/mappers/hyperliquid.ts

@@ -117,6 +117,7 @@ export class HyperliquidDerivativeTickerMapper implements Mapper<'hyperliquid',
     }
 
     if (pendingTickerInfo.hasChanged()) {
+      pendingTickerInfo.updateTimestamp(localTimestamp)
       yield pendingTickerInfo.getSnapshot(localTimestamp)
     }
   }