Generates and modifies Ash actions based on workflow step declarations.

Adds or modifies the following actions on the resource:

• Transition actions (for manual steps) — one :update action per declared transition entity. Each includes:

  • BuiltinChanges.transition_state(target) to move the state
  • AshWorkflow.Changes.RecordEvent (triggered_by: :manual) to write through state_entered_at and append a log row if a transition_log is configured

• Automatic step action injection — for automatic steps, the user defines their own update action with business logic. This transformer finds that action by the step's action name and appends transition_state and RecordEvent (triggered_by: :automatic) changes to it. Raises at compile time if the action is not defined on the resource.

• Timeout transition actions — for timeouts with transition_to, generates a hidden update action named __timeout_<step>_<name> that transitions to the target state and records the event (triggered_by: :timeout).

• Undo action — when the workflow declares an undo block, a single :undo update action that rewinds the record to the state before its most recent undoable state change. Not atomic: the target is only known after reading the transition log.

• Primary read action — if the workflow has automatic steps (which generate Oban triggers) and no primary read action is defined, generates one with keyset pagination enabled (required by ash_oban).

Also adds a resource-global change RecordEvent, on: [:create] (triggered_by: :initial), since workflows are started through the user's own create action rather than a generated one — there is no per-action call site to inject into for that event.