unsort_db_schema_columns

https://github.com/jakeonrails/unsort-db-schema-columns

Rails 8 (PR #53281) sorts schema.rb columns alphabetically. That breaks db:schema:load parity with production, Postgres column-alignment padding, add_column :after/:before, and bulk-import pipelines that depend on SELECT * column order. This gem prepends ActiveRecord::SchemaDumper to dump columns in the order the database actually stores them.