Backend Migrations

Create and manage database migrations with proper rollback strategies, zero-downtime deployments, and version control. Use this skill when creating new database migrations, when modifying database schema (adding tables, columns, indexes), when writing rollback/down methods for migrations, when managing index creation on large tables, when separating schema changes from data migrations, when handling backwards compatibility during deployments, when naming migration files, or when dealing with database version control and deployment strategies.