Fix valid batch size to 1

Closes #129 (closed)

changed milestone to %DAN-P4: Improve data loading and preprocessing

added P1 label

assigned to @melodie.boillet

requested review from @starride

Looks good to me! We could perhaps add a section in usage/train/parameters/#training-parameters to say that the validation step is done with batch_size=1 and explain why? Or maybe just in our internal documentation.

approved this merge request

added 3 commits

• d580a769 - 1 commit from branch main
• 63382b8a - Fix valid batch size to 1
• 88f2046d - Add comment in doc about validation batch size

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merged