Mutations operations

Back to full reference Atomic mutation plan preview and execution.

Operation	Member path	Mutates	Idempotency	Tracked	Dry run
`mutations.preview`	`mutations.preview`	No	`idempotent`	No	No
`mutations.apply`	`mutations.apply`	Yes	`non-idempotent`	Yes	No
`plan.execute`	`plan.execute`	Yes	`non-idempotent`	No	No