[Bug]: Make sure format stays the same on download for common file types

[maxjmohr]

Summary

We need to make sure that for all common file types (e.g. pdf, word, pptx, xlsx, ...) that the formats of the uploaded document stay the same when downloaded.

Steps to Reproduce

Upload relevant file types and make sure that they have the same format and structure when downloaded as uploaded.

Expected Behavior

No response

Actual Behavior

No response