Form end meta field not correctly populated when the form ends

[jkuester]

Describe the bug
CHT forms support several meta fields including start and end that are supposed to record the exact time the form began and the form ended.

Unfortunately, the end value is always just recorded as (almost) the exact same value as the start regardless of how long the user takes to fill out the form.

To Reproduce
Create a form that contains:

type	name
start	start
end	end

1. Begin the form
2. Wait a bit of time (at least a few seconds)
3. Submit the form
4. See that the different between start and end do not match the time waiting before submitting the form.

Expected behavior
The end value should contain the time that the form was submitted.

Additional context
Originally reported on the forum.

It appears this is a regression that happened as a result of the Enekto Uplift in 4.0.0. I tested and confirmed everything works as expected in 3.17.2, but it is broken in 4.0.0.

Debugging through the Enekto code flow, it appears the start and end values are preloaded correctly, but the BeforeSave event is never triggered for the form.

[jkuester]

One workaround worth noting here is that the reported_date for the report does reflect the date/time the form was completed. So, it can be referenced as the "end" time.