Fix LogEventStore end epoch log

[laggui]

Checklist

• Confirmed that run-checks all script has been executed.

Issue

Noticed that the reported validation epoch was off by 1 in the logs. For example, if you run the mnist example without early stopping to let it run for the full 10 epochs, you will see in the artifact dir:

$ ls train/
epoch-1  epoch-10  epoch-2  epoch-3  epoch-4  epoch-5  epoch-6  epoch-7  epoch-8  epoch-9

$ ls valid/
epoch-1  epoch-10  epoch-11  epoch-3  epoch-4  epoch-5  epoch-6  epoch-7  epoch-8  epoch-9

Notice how there is no epoch-2 in valid/ but the epochs go up to 11.

Changes

Removed the epoch + 1 in logger.end_epoch call for validation.

Not sure if this was incremented for historical reasons that are no longer relevant, but with this easy fix everything seems to be in order when I check the log folders.

Testing

Ran the mnist example again after and the epochs match for train and valid:

$ ls train/
epoch-1  epoch-10  epoch-2  epoch-3  epoch-4  epoch-5  epoch-6  epoch-7  epoch-8  epoch-9

$ ls valid/
epoch-1  epoch-10  epoch-2  epoch-3  epoch-4  epoch-5  epoch-6  epoch-7  epoch-8  epoch-9