Add more database development related docs

See merge request !13466

Fixes icon sidebar expanding causing a jump in padding

Closes #36456

See merge request !13568

Comma separated values really are a form of serialised data so we should
clarify that we shouldn't store such data in the DB.

Merge branch '36442-images-in-issue-descriptions-no-longer-scale-to-the-width-of-their-container' into 'master'

Resolve "Images in issue descriptions no longer scale to the width of their container"

Closes #36442

See merge request !13586

Make sort by dropdown style consistent

See merge request !13253

Document "Pick into Backports" label in PROCESS.md

See merge request !13565

Circuitbreaker settings to avoid spec-failures

Closes #36324

See merge request !13519

Fix edit milestone path from group milestones list

Closes #36430

See merge request !13581

Fix race condition with dispatcher.js

See merge request !13377

Fixes sticky class being removed when over-scrolling in Safari

Closes #36457

See merge request !13556

`failure_count_threshold`: We should never need this, but we don't
want to block access in tests because of this.

`failure_wait_time`: Setting it to 0 now allows each storage attempt

`storage_timeout`: Try a bit longer to access storage on CI in case
the slow machines take a bit longer to spin up the process to perfom
the check

This allows testing every storage attempt after a failure. Which could
be useful for tests

Change find to within for detecting bad search specs

Closes #35460

See merge request !13383

Whitelist or fix additional `Gitlab/PublicSend` cop violations

See merge request !13467

Commits API: Listing commits for public repo doesn't require authentication

Closes #34049

See merge request !13287

Update Git version for source installs to match Omnibus

See merge request !13351

Enable Layout/TrailingWhitespace cop and auto-correct offenses

See merge request !13573

Fix CI_PROJECT_PATH_SLUG slugify

Closes #34643

See merge request !13350

Don't depend on `Rails` for Redis configuration file paths

Closes #36514

See merge request !13575

Speed up project creation by inlining repository creation

Closes #34533

See merge request !13529

Don't create event in Merge Request Create Service

Closes #36465

See merge request !13566

Fix the fly-out menu in the sidebar not displaying in Safari

Closes #36441

See merge request !13445

Add documentation for groups issue filtered search

Closes #36377

See merge request !13572

Fix username autocomplete group name with no avatar alignment

Closes #36502

See merge request !13578

Fix 'Projected tags' typo in protected_tags_spec.rb

See merge request !13576

Make sure MySQL would not use CURRENT_TIMESTAMP as the default for timestamp columns

Closes #36405

See merge request !13560

Many Repo Fixes

See merge request !13432