missing mime types for rendereers and file usability

[imortaltatsu]

Description

the issue is that the blobs from aggregators should be rendered by. the browser gif they are a popular filetype like pdf, jpg,png,mp4,wav,mp3 but instead it aggregators return a unlabelled blob file which are difficult to identify and are downloaded

Code of Conduct

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[github-actions]

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[imortaltatsu]

we can do mime type detection for these blobs based using magic bytes and label the missing file type for unencrypted data