The default scope in Event would add a "WHERE author_id IS NOT NULL"
clause to every query. Now that "events.author_id" has a NOT NULL clause
set this filter is redundant and we can safely remove it.

In this commit we also add a validation on events.author_id (previously
only defined in PushEvent) just in case something tries to create data
without an author ID. This way we can present a nicer error message
compared to PostgreSQL's foreign key error messages.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/38129

Enable ee_compat_check for forks, but not EE

Closes #37713

See merge request gitlab-org/gitlab-ce!14189

Add Gitaly version to Admin Dashboard

Closes #36884

See merge request gitlab-org/gitlab-ce!14313

Fix rewriting issue references with group milestones

Closes #37746

See merge request gitlab-org/gitlab-ce!14294

Resolve "make project data via API report forks of this project"

Closes #20049

See merge request gitlab-org/gitlab-ce!14355

Add tooltip for milestone due date to issue and merge request lists

Closes #18864

See merge request gitlab-org/gitlab-ce!14318

Clarify how to rename username or group path

See merge request gitlab-org/gitlab-ce!13914

Remove depreceted and big projects

Closes #37507

See merge request gitlab-org/gitlab-ce!14336

Add `test-prof` and use `set` in API specs

See merge request gitlab-org/gitlab-ce!14370

Add specific code review guidelines

See merge request gitlab-org/gitlab-ce!13206

Update LICENSE to carve out third party licenses.

See merge request gitlab-org/gitlab-ce!14374

Encode paths properly for Gitaly Commit{Diff,Delta}

Closes gitaly#589

See merge request gitlab-org/gitlab-ce!14361

* Will dry up the code to find projects between the ForksController and the API

Resolve "Handle if Auto DevOps domain is not set"

Closes #37894

See merge request gitlab-org/gitlab-ce!14319

Resolve some tech debt in the prettyTime module

Closes #37298

See merge request gitlab-org/gitlab-ce!14058

Revert feature highlight

Closes #38087

See merge request gitlab-org/gitlab-ce!14373

And link to it from where you change your username.

And expand on the help text.

Merge branch '37890-auto-devops-banner-is-not-shown-when-the-repository-is-empty-new-project' into 'master'

Resolve "Auto DevOps banner is not shown when the repository is empty (new project)"

Closes #37890

See merge request gitlab-org/gitlab-ce!14321

Reorganize indexes for the "deployments" table

Closes #36877

See merge request gitlab-org/gitlab-ce!14348

Prepare cherry-pick and revert for migration to Gitaly

See merge request gitlab-org/gitlab-ce!14339

Do not perform hard check (presence of file on storage)

Closes #37945

See merge request gitlab-org/gitlab-ce!14369

Displays the Gitaly version in the admin dashboard.

Add rake task to check db schema is valid

Closes #37568

See merge request gitlab-org/gitlab-ce!14365

Only show the sidebar scroll bars if the user can scroll

Closes #37972

See merge request gitlab-org/gitlab-ce!14335

Replace "/" with "-" in cache key documentation

See merge request gitlab-org/gitlab-ce!14034

Implement job policy specifications

Closes #37280

See merge request gitlab-org/gitlab-ce!14265

Instead perform soft check (the column set to indicate that file does exist)