Base module for Durable internal migrations.

This module provides the behaviour and DSL for creating Durable migrations. Each migration is a module that implements version/0, up/1, and down/1.

Usage

defmodule Durable.Migration.Migrations.V20260103120000AddCompensation do
  use Durable.Migration.Base

  @impl true
  def version, do: 20_260_103_120_000

  @impl true
  def up(prefix) do
    alter table(:workflow_executions, prefix: prefix) do
      add(:compensation_data, :jsonb)
    end
  end

  @impl true
  def down(prefix) do
    alter table(:workflow_executions, prefix: prefix) do
      remove(:compensation_data)
    end
  end
end

The prefix argument is the PostgreSQL schema name (default: "durable"). All Ecto.Migration functions are available (create, alter, drop, execute, etc.).