ENG-6472 Added histogram latency stats to web studio

You can't rely on expiration to be timely for web studio. I think what you want to do is use the timestamp included with the stat to spot duplicates and if you see one just display the last value. You would have to do the same thing in VEM.

Granted with clock accuracy being what it is it's pretty unlikely to be an issue even if you set the expiration here to 1000, remember that if Studio tries to do something every second it is guaranteed to take more than 1000 seconds modulo clock accuracy.