Test that videos only get image thumbnails in OGP metadata when we can produce them with Preview Proxy

This was a wasteful shortcut to MediaProxy.preview_url/1 and we don't
always want the preview_url in the metadata anyway.

This is what Mastodon uses and might fix some link preview bugs I've encountered

Support metadata for video files too

See merge request !3441

Improve opengraph embeds

See merge request !3442

Recompilation speedup: break out Pleroma.Web.Params.truthy_param?/1 from ControllerHelper

See merge request !3449

Alex Gleason authored May 22, 2021 and feld committed Jun 08, 2021

Breaks cycle in lib/pleroma/web/api_spec/operations/status_operation.ex

Recompilation speedup: use generic types in @spec in Upload.Filter

See merge request !3453

Recompilation speedup: create WrapperAuthenticator and simplify Authenticator behaviour

See merge request !3454

Speeds up recompilation by reducing compile-time cycles

Speeds up recompilation by reducing compile-time deps

Fix test warnings

See merge request !3452

Add Raspberry Pi install instructions

See merge request pleroma/pleroma!3430

Recompilation speedup: Put custom guards in Web.Utils.Guards

See merge request !3451

Speeds up recompilation by removing a compile-time cycle on AdminAPI.Search

get prune_objects to work again

See merge request !3397

Recompilation speedup: create MRF.Policy behaviour separate from MRF module

See merge request !3450

# Conflicts:
#   CHANGELOG.md