Add pool latency into API response

[Bedasek]

Can you please add latency value in ms to the API response?
I can see the latency in the log file so surely it should be easy to add into API stack.
So when I query API, the response would look as follows:

"Algorithm": "SHA256-TON",
"Pool": "https:\/\/ton-pool-server-p3agi.ondigitalocean.app:443",
"Latency": 56,