Improve Varnish VCL

See merge request pleroma/pleroma!3305

This fixes connection failures when trying to retrieve large files.
It is less common in typical Pleroma usage, but it's possible to encounter
this on a cloud instance with lower memory.

Also only check for subject as the body is a mess of html and we don't really need to prove its contents if the subject matches.

Standardize the way we capture and use Mix.env()

See merge request pleroma/pleroma!3303

Improve error message for ConfigDB

See merge request pleroma/pleroma!3289

Redirect non-local activities when /notice/:id is used

See merge request pleroma/pleroma!3300

Related-to: https://git.pleroma.social/pleroma/pleroma/-/issues/2496

Stop external emoji example from leaking

See merge request pleroma/pleroma!3302

Currently only works if the reporting actor is an admin, but if we include
moderators with those who receive notification reports it will work for them.

Account schema: specify that pleroma.relationship is nullable

See merge request pleroma/pleroma!3299

CI: Forgot $ in spec-deploy

See merge request pleroma/pleroma!3298

Support for expires_in/expires_at in filters

Closes #2412

See merge request pleroma/pleroma!3279

# Conflicts:
#   CHANGELOG.md

Fix for scheduled post with poll

Closes #2449

See merge request pleroma/pleroma!3294

Feature/2438 users/instances posts total count

Closes #2438

See merge request pleroma/pleroma!3270

CI: Add job ref when calling api docs builder

See merge request pleroma/pleroma!3297

Just grabbing the latest artifact for the branch does not work because
gitlab will only change the latest artifact when the whole pipeline
finishes

Improve OpenAPI spec and deploy it to api.pleroma.social

See merge request pleroma/pleroma!3296

Too many changes in OpenAPI spec to describe each one, but
basically it is tag fixes, bringing consitency to operation summaries
and fixing some incorrect information.

mix: instance: ensure all needed folders are created before generating config

See merge request pleroma/pleroma!3284

Email-like field in /api/v1/accounts/verify_credentials (for PeerTube OAuth plugin and alike)

See merge request pleroma/pleroma!3286

Majic: don't fix extensions

See merge request pleroma/pleroma!3287

Support for with_relationships parameter

Closes #2411

See merge request pleroma/pleroma!3290

# Conflicts:
#   CHANGELOG.md
#   docs/development/API/differences_in_mastoapi_responses.md

fix and delete purge activities duplicates

Closes #2473

See merge request pleroma/pleroma!3285

Unifying timelines api arguments

Closes #2164

See merge request pleroma/pleroma!3281