Refactor `NotificationMailer` to use parameterization (#25718)

Change feed merge, unmerge and regeneration workers to use a replica (#25849)

Fix trend calculation working on too many items at a time (#25835)

Change label and design of sensitive and unavailable media in web UI (#25712)

Remove unused `NotificationMailer#digest` preview (#25719)

Admin mailer parameterization (#25759)

Remove unused `missed_update` state (#25832)

Add toast with option to open post after publishing in web UI (#25564)

Fix dropdowns being disabled for logged out users in web UI (#25714)

Fix explore page being inaccessible when opted-out of trends in web UI (#25716)

Add forwarding of reported replies to servers being replied to (#25341)

First pass at multi-database for read replica using Rails native adapter (#25693)

Co-authored-by: emilweth <7402764+emilweth@users.noreply.github.com>

Convert `<DismissableBanner>` to Typescript (#25582)

Rewrite `<ShortNumber />` as FC and TS (#25492)

simplify counters (#25541)

Regenerate brakeman ignore, pruning warnings (#25749)

Fix translate button position (#25807)

Bump version to v4.1.4 (#25805)

Tag images with the latest tag only when running against the latest stable branch (#25803)

Fix crash in admin interface when viewing a remote user with verified links (#25796)