I've been wanting to do this for a while; I think it'll let us
check for some significant changes between composes. This should
cause runs of a few test cases to collect and upload info on:
- installed packages
- free memory
- disk space
- active services
- 1 minute of CPU usage info (via top)
immediately after install and initial login. In some cases this
will be useful / interesting simply to look at directly, but
we can also have check-compose analyze the data and include
significant changes in its reports.