Appview: permit redirects during blob resolution

[devinivy]

Followup to changes in #3177, ensure we still follow redirects during blob resolution.

[matthieusieben]

Yep, This seems like the way to go !

[snarfed]

Thanks @devinivy! Looks like this hit Bridgy Fed too, we redirect getBlob requests too, and our images stopped working some time last night. Definitely looking forward to seeing this deployed!

[devinivy]

It was deployed today, should be resolved!

[snarfed]

Woo, thank you! Confirmed, Bridgy Fed's images are working now.

[snarfed]

@devinivy just fyi I got a report of a specific account whose images still aren't working, https://bsky.app/profile/mattdsteele.carhenge.club.ap.brid.gy . Blobs in the records seem to be fine, we're serving getBlob 301 redirects like normal. Oddly their videos are still up and working ok in bsky.app, which is surprising. The images and videos are all on S3, served directly from s3-us-east-2.amazonaws.com URLs.

Examples: https://pdsls.dev/at/did:plc:ptr3w7zzvw4fo6vdra3gjprn/app.bsky.feed.post/3lfsyvwyu3cu2 (broken image), https://pdsls.dev/at/did:plc:ptr3w7zzvw4fo6vdra3gjprn/app.bsky.feed.post/3lflnkn65fgz2 (ok video)

cc @mattdsteele

[devinivy]

With #3379 I think we're good to go— @snarfed appreciate your patience as we ironed this out!

[snarfed]

@devinivy totally ok, thanks for the quick fixes!