fix(mpu): missing content type on complete

[farnabaz]

Cloudflare multi-part upload does not return httpMetadata and customMetadata when the upload is complete. As we depend on customMetadata to find contentType of the file, this behavior leads to undefined contentType.

There are two solutions so far:

1. call hubBlob().head(mpu.key) in upload complete and re-fetch the information on file (adds one extra read operation on all uploads)
2. re-evaluate contentType using our getContentType if it's missing. This PR proposes this solution.

[pkg-pr-new]

Open in Stackblitz

npm i https://pkg.pr.new/nuxt-hub/core/@nuxthub/core@517

commit: 470a0ba