[➕ Feature]: Enhacement maintenance window behavior

[diegovb-sys]

Is your feature request related to a problem? Please describe.
Recently, we have found some improvements to do around the maintenance window feature.

1. If all of the maintenance window have their END < currently date the alerts should be free.
2. In order to avoid multiple WF execution, these WF should be executed over a fingerprint (i.e LastAlert) not over every Alert.

I will provide a PR to address these improvements.