This ensures that the "author" association of an event's "target"
association is eager loaded whenever the "target" association defines an
"author" association. This in turn solves the N+1 query problem we first
tried to solve in
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/15788 but caused
problems when displaying milestones as those don't define an "author"
association.

The approach in this commit does mean that the authors are _always_
eager loaded since this takes place in the "belongs_to" block. This
however shouldn't pose too much of a problem, and as far as I can tell
there's no real way around this unfortunately.

Fix user membership destroy relation

Closes #40053

See merge request gitlab-org/gitlab-ce!15970

QA: Add a scenario for adding a deploy key

See merge request gitlab-org/gitlab-ce!16096

Ignore "lost+found" folder during backup on a volume

Closes #22672 and #17574

See merge request gitlab-org/gitlab-ce!16036

Update prometheus gem to version that publishes +Inf bucket in accordance with Prometheus docs.

See merge request gitlab-org/gitlab-ce!16175

Forking a project to a namespace with lower visibility

Closes #40022

See merge request gitlab-org/gitlab-ce!16050

everything in the scenario without a before block.

Clears visual token on second backspace

Closes #38596

See merge request gitlab-org/gitlab-ce!15348

Merge branch '39289-local-schema-rb-automatically-reverts-datetime-to-datetime_with_timezone-after-migrations' into 'master'

Prevent schema.rb reverting from datetime_with_timezone to datetime

Closes #39289

See merge request gitlab-org/gitlab-ce!14956

Resolve "Rename "Browse file" inputs to "Choose file""

Closes #40780

See merge request gitlab-org/gitlab-ce!16092

Fix breadcrumbs in User Settings

Closes #40274

See merge request gitlab-org/gitlab-ce!16172

Rename asset sync related AWS variables

See merge request gitlab-org/gitlab-ce!16154

Closes #40274

Fix 404 error after a user edits an issue description and solves the reCAPTCHA

Closes #41445

See merge request gitlab-org/gitlab-ce!16167

Documenting that resolved JIRA tickets are not automatically transitioned

See merge request gitlab-org/gitlab-ce!16162

When editing an issue, use the PUT method instead of POST to avoid
a 404 after solving the reCAPTCHA.

Closes #41445

Adjust content width for User Settings, GPG Keys

See merge request gitlab-org/gitlab-ce!16093

Keep typographic hierarchy in User Settings

See merge request gitlab-org/gitlab-ce!16090

Fix links to old commits in merge request comments

Closes #41492

See merge request gitlab-org/gitlab-ce!16152

Add pause/resume button to project runners

Closes #20035

See merge request gitlab-org/gitlab-ce!16032

Move encoding methods to the more general EncodingHelper

Closes gitaly#847

See merge request gitlab-org/gitlab-ce!16137

In this case the project will get the minimum between both
visibilities.

If that visibility is restricted, then a lower level will be picked.

- Authentication log
- Notifications

Resolve "First request after GDK server started is slow"

Closes #38930

See merge request gitlab-org/gitlab-ce!16153

Fixed abuse reports link url

See merge request gitlab-org/gitlab-ce!16068

Bumped mysql2 gem version from 0.4.5 to 0.4.10.

See merge request gitlab-org/gitlab-ce!16034

Resolve "Webpack Roadmap"

Closes #38869

See merge request gitlab-org/gitlab-ce!16076