Sub-minute scheduling does not work

[mountaindude]

Describe the bug
Having a schedule of every 55 seconds results in this execution plan:

2021-10-21T14:53:55.945Z
2021-10-21T14:54:00.945Z
2021-10-21T14:54:55.945Z
2021-10-21T14:55:00.945Z
2021-10-21T14:55:55.945Z
2021-10-21T14:56:00.945Z
2021-10-21T14:56:55.945Z
2021-10-21T14:57:00.945Z
2021-10-21T14:57:55.945Z
2021-10-21T14:58:00.945Z

Which is not what's expected.

This is however happening due to how the underlying scheduling library works (discussion here).
For now this will not be fixed in Butler CW. A proper/better implementation may be added in future versions of Butler CW.

[mountaindude]

Update doc file wrt to the above!