make log rotation more granular to a day

[h4ck3rk3y]

Background & motivation

7 days is too long; need. to lower to a day

Desired behaviour

kurtosis engine restart --retention 1d/1w

How important is this to you?

Painful; the lack of this feature makes using Kurtosis frictionful.

What area of the product does this pertain to?

CLI: the Command Line Interface