Allow KPI Period settings to span across midnight into the following day.

When creating a KPI, the End Time must be later than the Start Time.

For example, setting:

results in an error because 6:00 AM is earlier than 5:00 PM.

Example Use Case:

For monitoring the response time of night shift responders, users may need to monitor requests created between:

5:00 PM → 6:00 AM (next day)

The KPI should recognize this as a valid 13-hour period spanning two calendar days.

[ALR]