The single canonical migration file template used by every migration
generator in this codebase (Migrator.createMigration, MigrationCli.create,
cli.ts migration:create). Produces a CommonJS module.exports = { up, down }
file, which is the format Migrator.loadMigrationFile() requires via
require() (for .ts files this is transpiled on the fly via ts-node).
Keeping exactly one template in one place means the loader and the generator can never drift out of sync again.
Migration System - Main entry point for all migration-related exports Provides migration management capabilities for the TypeScript ORM