Fix failure when issue author is nil

See merge request !13807

Docs: update - fix headers

See merge request !13819

Fix searching for files by path

Closes #36939

See merge request !13798

Remove leftover API helper for removed CI API

See merge request !13804

Re-allow appearances.description_html to be NULL

Closes #36919

See merge request !13806

Set a default CI/CD status when it is not known

Closes #36790

See merge request !13737

Fix invite by email address duplication

Closes #36937

See merge request !13826

Use gitaly-proto 0.31.0

See merge request !13795

Reword job to pipeline on the chart view

Closes #36928

See merge request !13786

This reverts merge request !13812

Reenable MySQL tests on all CE and EE branches

Closes #36384

See merge request !13812

This reverts merge request !13813

New doc: how to install GitLab on Azure

See merge request !13811

Add `:nested_groups` metadata to `Groups::NestedCreateService` specs

See merge request !13809

Enable 5 lines of Sidekiq backtrace lines to aid in debugging

Closes #27626

See merge request !13813

Customers often have Sidekiq jobs that failed without much context. Without
Sentry, there's no way to tell where these exceptions were hit. Adding
in additional lines adds a bit more Redis storage overhead. This commit
adds in backtrace logging for workers that delete groups/projects and
import/export projects.

Closes #27626

To protect master from surprise failures, as long as we continue to support MySQL.

Alternative fix for 422 when using standard login with ldap enabled

See merge request !13103

This column isn't always set (e.g. when upgrading from older instances)
and technically it could be NULL (e.g. when flushing the cache).

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/36919

This avoids loading the `OmniAuthCallbacksController` at boot time so
it doesn't mess up the `before_action`-chain

Hide group title on sidebar collapse; use more generic class for titles

Closes #36589

See merge request !13777

Remove underscore-rails gem

Closes #36712

See merge request !13781

Move GitHooksService into Gitlab::Git

See merge request !13739

Changed all font-weight values to 400 and 600

Closes #34138

See merge request !12896

Merge branch 'fix/sm/36731-improve-spec-spec-features-runners_spec-rb-and-spec-features-admin-admin_runners_spec-rb' into 'master'

Reorganizes spec: spec/features/runners_spec.rb

Closes #36731

See merge request !13716

Do not fire synchronous hooks when creating a job

Closes #35286

See merge request !13734

Thenable ajax api calls

See merge request !13427

Fix old MR diffs

Closes #36516

See merge request !13744

Add an option to list only archived projects

Closes #35994

See merge request !13492