Deployment windows in a recurring week

Deployments are planned on a recurring week measured in minutes, from 0 to 10,079, and the same schedule repeats every week. Teams declare windows in which deployment is allowed and windows in which it is frozen.

1. Return the windows in which a deploy may happen: the allowed time minus every freeze, merged and sorted.
2. Later parts read the windows from CSV lines, let windows wrap around the end of the week, give them in different time zones, and add filters on which windows apply.