Get project factory uptime

Counts the runs this project's Loops started that finished (completed, failed or cancelled), and how many of them failed on the platform, in the requested window (filter[timestamp][gte] to the exclusive filter[timestamp][lt], at most 90 days, the last 7 days when neither is given) and in the window of the same length just before it, by run creation time. Agent, setup, credit, limit and policy failures are not platform failures. Uptime is finished runs without a platform failure divided by finished runs. series has one point per UTC day that the current window touches, zeros included, so the points add up to current.