(security-9-1) Upload files into `public/upload/system` instead of `public/upload`

See merge request !2099

- Move existing uploads there.
- Rename the existing `system` namespace to `system0`

Allow users autocomplete by author_id only for authenticated users

See merge request !2100

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

(security-9-1) Add correct `rel` attributes to external links when rendering markdown

See merge request !2097

New Hamlit XSS fix, does not include extraneous changes

See merge request !2095

And add the correct `rel` attributes to rendered HTML for markdown

(security-9-1) Render asciidoc & other markup using banzai in a pipeline

See merge request !2098

Preventing XSS

add issues and merge-requests classes and use to find in rspec

See merge request !10980

Accept default branch param on notifaction services

Closes #31173

See merge request !10959

Use GitLab Pages v0.4.1

See merge request !10891

Add index on ci_runners.contacted_at

Closes #31229

See merge request !10876

Refactoring rake task to import GitHub repositories

See merge request !10695

correct documentation on opt-out-ness of usage ping

See merge request !10945

Skip validation when creating internal (ghost, service desk) users

See merge request !10949

Fix ordering of commits in the network graph.

Closes #30973

See merge request !10936

Resolve "Milestone sidebar display incorect number of MR when minimized"

Closes #31292

See merge request !10933

Remove description for build_events, add pipeline_events

Closes #30645

See merge request !10908

Lazily set UUID in ApplicationSetting for new installations

Closes gitlab-ee#2246

See merge request !10893

[ci skip]

Ensures that OAuth/LDAP/SAML users don't need to be confirmed

See merge request !10925

Skip issuable without a project in IssuableExtractor#extract

Closes #31280

See merge request !10906

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Add sub-nav for Project Integration Services edit page

Closes #31174

See merge request !10813

Fix usage ping docs link from empty cohorts page

See merge request !10907

Fix OAuth, LDAP and SAML SSO when regular sign-ups are disabled

See merge request !10904

Wrap MR content -stable branch

See merge request !10914

Signed-off-by: Rémy Coutable <remy@rymai.me>

Add a transaction around `move_issues_to_ghost_user`

See merge request !10465

Properly expire cache for **all** MRs of a pipeline

Closes #31040

See merge request !10770