Change `DB_REPLICA_*` environment variables to `REPLICA_DB_*` (#26386)

app/models/application_record.rb

@@ -5,7 +5,7 @@ class ApplicationRecord < ActiveRecord::Base
 
   include Remotable
 
-  connects_to database: { writing: :primary, reading: ENV['DB_REPLICA_NAME'] || ENV['REPLICA_DATABASE_URL'] ? :replica : :primary }
+  connects_to database: { writing: :primary, reading: ENV['REPLICA_DB_NAME'] || ENV['REPLICA_DATABASE_URL'] ? :replica : :primary }
 
   class << self
     def update_index(_type_name, *_args, &_block)

config/database.yml

@@ -55,10 +55,10 @@ production:
     prepared_statements: <%= ENV['PREPARED_STATEMENTS'] || 'true' %>
   replica:
     <<: *default
-    database: <%= ENV['DB_REPLICA_NAME'] ||ENV['DB_NAME'] || 'mastodon_production' %>
-    username: <%= ENV['DB_REPLICA_USER'] ||ENV['DB_USER'] || 'mastodon' %>
-    password: <%= (ENV['DB_REPLICA_PASS'] || ENV['DB_PASS'] || '').to_json %>
-    host: <%= ENV['DB_REPLICA_HOST'] ||ENV['DB_HOST'] || 'localhost' %>
-    port: <%= ENV['DB_REPLICA_PORT'] ||ENV['DB_PORT'] || 5432 %>
+    database: <%= ENV['REPLICA_DB_NAME'] ||ENV['DB_NAME'] || 'mastodon_production' %>
+    username: <%= ENV['REPLICA_DB_USER'] ||ENV['DB_USER'] || 'mastodon' %>
+    password: <%= (ENV['REPLICA_DB_PASS'] || ENV['DB_PASS'] || '').to_json %>
+    host: <%= ENV['REPLICA_DB_HOST'] ||ENV['DB_HOST'] || 'localhost' %>
+    port: <%= ENV['REPLICA_DB_PORT'] ||ENV['DB_PORT'] || 5432 %>
     prepared_statements: <%= ENV['PREPARED_STATEMENTS'] || 'true' %>
     replica: true