This enhances a few performance guideline titles in the development
README, making it easier to understand what topics they cover.

Respect the user commit email in more places

Closes #51564

See merge request gitlab-org/gitlab-ce!21773

Update database requirements documentation with more MySQL limitations

See merge request gitlab-org/gitlab-ce!21686

Correct usage of the have_link matcher

See merge request gitlab-org/gitlab-ce!21755

Resolve "Open issues from archived project listed in group issue board"

Closes #45754

See merge request gitlab-org/gitlab-ce!21721

Resolve character encodings in CONTRIBUTING

See merge request gitlab-org/gitlab-ce!21781

Expose runners status information in job api

Closes #51273

See merge request gitlab-org/gitlab-ce!21618

Return a default commit email if migration has not completed

Closes #51530

See merge request gitlab-org/gitlab-ce!21790

QA: Fix: set initial password even if using admin credentials

See merge request gitlab-org/gitlab-ce!21785

Add a new scenario to add an SSH key, perform Git actions with it, and then remove the key

See merge request gitlab-org/gitlab-ce!19754

Fix haml-lint error in 2FA codes partial

Closes #51585

See merge request gitlab-org/gitlab-ce!21786

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/51585

Allow UrlValidator to work with attr_encrypted

See merge request gitlab-org/gitlab-ce!21776

Sync commonmaker version in Gemfile.*.lock

Closes #51557

See merge request gitlab-org/gitlab-ce!21782

commonmaker was update in Gemfile.lock only

Add fixture path argument to `MarkdownFeature.new`

See merge request gitlab-org/gitlab-ce!21754

Replace direct use of Gitlab::SQL::Union with a "from_union" method

Closes #51307

See merge request gitlab-org/gitlab-ce!21672

Pass the 'non_archived' flag to finder methods

Add Gitaly diff stats RPC client

See merge request gitlab-org/gitlab-ce!21732

Extend JUnit XML test report documentation to explicitly mention support for filename patterns.

See merge request gitlab-org/gitlab-ce!21619

Decouple file row from IDE

See merge request gitlab-org/gitlab-ce!21742

Add 2fa button

Closes #47963

See merge request gitlab-org/gitlab-ce!20117

Update Contribution guidelines via new community contribution flow

See merge request gitlab-org/gitlab-ce!21761

This adds a basic interface to fetch diff statistics given two SHAs.
It's a requirement for #49399 #20282 and #19232.

Resolve "Add runner JSON schema"

Closes #51093

See merge request gitlab-org/gitlab-ce!21525

Backport EE changes (missing exports)

See merge request gitlab-org/gitlab-ce!21772

Backport EE changes to `app/assets/javascripts/filtered_search/issuable_filtered_search_token_keys.js`

Include correct CSS file for xterm in environments page

Closes #50956

See merge request gitlab-org/gitlab-ce!21768

Fix double title in merge request chat messages

Closes #44586

See merge request gitlab-org/gitlab-ce!21670