Add trending links (#16917)

* Add trending links

* Add overriding specific links trendability

* Add link type to preview cards and only trend articles

Change trends review notifications from being sent every 5 minutes to being sent every 2 hours

Change threshold from 5 unique accounts to 15 unique accounts

* Fix tests

lib/mastodon/snowflake.rb

@@ -84,10 +84,7 @@ module Mastodon::Snowflake
               -- Take the first two bytes (four hex characters)
               substr(
                 -- Of the MD5 hash of the data we documented
-                md5(table_name ||
-                  '#{SecureRandom.hex(16)}' ||
-                  time_part::text
-                ),
+                md5(table_name || '#{SecureRandom.hex(16)}' || time_part::text),
                 1, 4
               )
             -- And turn it into a bigint

lib/tasks/repo.rake

@@ -96,7 +96,7 @@ namespace :repo do
     end.uniq.compact
 
     missing_available_locales = locales_in_files - I18n.available_locales
-    missing_locale_names = I18n.available_locales.reject { |locale| SettingsHelper::HUMAN_LOCALES.key?(locale) }
+    missing_locale_names = I18n.available_locales.reject { |locale| LanguagesHelper::HUMAN_LOCALES.key?(locale) }
 
     critical = false