[ELE-2346] Detection period smaller than a day do not work.

[elongl]

Describe the bug

Users are unable to define a detection_period that is smaller than a day. Here's the explanation:

1. We calculate the backfill_days according to the detection_period.
2. We convert it to days.
3. We cast the result to int. This means that if the detection_period was 2 (hours) / 24 (hours) = 0.083 (days) it'll result in 0.
4. We fail this check.

_ELE-2346