✨ Sprint | Add support for multiple-Sprints when transitioning to a new Sprint

[jernejk]

When we start a new Sprint, daily scrum generation isn't quite right as it can't see what happened yesterday. This is because it only supports the latest, and we lose visibility for the previous day when a new Sprint starts.

NOTE: This issue only focuses when Sprints are one after another, which is the most common schedule. This issue should be completed before #106

Acceptance criteria

1. When a new Sprint starts the next day while the previous Sprint is no longer active, we should still be able to generate the "Yesterday" section correctly
2. Make sure it works when Sprint ends on Friday and starts on Monday