Split and paginate file tree from the diffs metadata
As well as paginating merge request file batches we could also paginate our metadata. This is important because a large MR can not only consist of large files but also of lots of files changed (hundreds and thousands). Having a pagination there should increase the perceived performance of the MR. Questions: * Is it possible? * Would it be considerably faster than fetching the whole metadata at once? * Downsides?
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