@layeron/migrations

@layeron/migrations plans and applies versioned SQL migrations for Layeron db modules.

The migration model follows the same safety shape as Supabase migrations:

• SQL migrations are versioned and ordered.
• Applied migrations are recorded in a database ledger.
• Applied migration checksums are immutable.
• Production deploys apply pending migrations in order.
• Destructive SQL is blocked unless the apply path explicitly allows it.
• Rollback is represented by a new forward migration.

This package owns migration safety and ledger behavior. Provider drivers and dev servers provide concrete database execution.