Use DAG serializer for pipelines controller

Closes #217813

See merge request gitlab-org/gitlab!31583

Add DAG entities for pipeline, stage, group, job.

Resolve "Footer System Message covers horizontal scrollbar"

Closes #30853

See merge request gitlab-org/gitlab!29212

Fixed linting issue

Adding missing changelog

Improve Requirements Management docs

See merge request gitlab-org/gitlab!30716

Find and replace issue links to add hyphens in /api and /development

See merge request gitlab-org/gitlab!32627

Merge branch '217605-make-group-namespace-name-in-email-a-link-to-group-overview-page' into 'master'

Make group/namespace name in email a link to group

Closes #217605

See merge request gitlab-org/gitlab!32461

- clearer for user when email received on what
  is being alerted upon.

Find and replace gitlab issue links in /doc/administration

See merge request gitlab-org/gitlab!32624

Fix wording about self re-activating user account

See merge request gitlab-org/gitlab!32620

Create initial acronyms test

Closes #209010

See merge request gitlab-org/gitlab!26625

This test creates a test for undefined acronyms, and seeds the list
with some of the more common ones found.

Links to issues need to be update to use a hyphen,
this MR changes issue links in /doc/api and development

Add terraform state metrics to usage data

Closes #207510

See merge request gitlab-org/gitlab!31280

Fix typo in issue_board.md

See merge request gitlab-org/gitlab!32672

Find and replace issue links to add hyphens in various dirs

See merge request gitlab-org/gitlab!32626

Fix a typo

See merge request gitlab-org/gitlab!32709

Fix linting error caused by new rule

See merge request gitlab-org/gitlab!32718

Add vale rule for codeblock fences

Closes #218321

See merge request gitlab-org/gitlab!32497

Update coverage regex parsing details

Closes #216253

See merge request gitlab-org/gitlab!32513

Telemetry for secret detection

See merge request gitlab-org/gitlab!31785

Return an instance of Feedback from Occurrence#_feedback methods

See merge request gitlab-org/gitlab!32459

Fix parent child pipeline relationship specs

See merge request gitlab-org/gitlab!32264

Coerce More-Logs-Offset HTTP header value to a string

See merge request gitlab-org/gitlab!32705

Show security reports summary in pipelines' Security Dashboard - Frontend

See merge request gitlab-org/gitlab!31136

- Created the :pipelines_security_report_summary feature flag
- Added GraphQL query for fetching security report summary
- Render filters with additional information
- Updated tests

Merge branch 'update-deprecated-slot-syntax-in-./app/assets/javascripts/pages/admin/projects/index/components/delete_project_modal.vue' into 'master'

Update deprecated slot syntax in `./app/assets/javascripts/pages/admin/projects/index/components/delete_project_modal.vue`

See merge request gitlab-org/gitlab!31994

Update deprecated slot syntax in `./app/assets/javascripts/pages/admin/projects/index/components/delete_project_modal.vue`

Create issue from alert

See merge request gitlab-org/gitlab!32193

Remove deprecated prefix variables

See merge request gitlab-org/gitlab!32347

Update PHPCS env flags in analyzer settings

See merge request gitlab-org/gitlab!31034

- Related to Issue #216507

The Rack spec
(https://github.com/rack/rack/blob/master/SPEC.rdoc#the-headers-)
expects all HTTP header values to be strings; integers are not
allowed. Some Rack servers, such as Thin, fail if you attempt to assign
a integer because they attempt to run string operations (e.g. `chomp`)
on the value.