added activity_constraints.py for easy hard-coded rate limiting activities (eg. must be X hours, min/max per day), as well as 24-hour activity dashboard to monitor if this is working

helps manage cost before we let it run 24/7*

*he might nap a lot at first, before we get a better sense of cost/activity, etc.

Source: x.com/yoheinakajima/status/1863069727813202398