Add latency to UDP tracker logs

[josecelano]

Parent issue: #687
Relates to: torrust/torrust-index#468

Like we do for the API (latency=0):

2024-02-20T09:49:44.345137882+00:00 [API][INFO] request; method=GET uri=/v1/tags request_id=6a63a803-e9c6-4cba-bac0-87bf2983d68b
2024-02-20T09:49:44.345957155+00:00 [API][INFO] response; latency=0 status=200 OK request_id=6a63a803-e9c6-4cba-bac0-87bf2983d68b