Compensation
Domain-specific compensation dispatcher used by SagaCompensationEngine.
Implementations dispatch on the typed TCommand (typically a Kotlin sealed interface mirroring the Avro tagged union) and invoke domain-level compensations (e.g. delete user, revert email update) — usually by delegating to an application-layer use case.
Strongly-typed by design — replaces the previous untyped Map<String, Any?> envelope and action: String discriminator with an exhaustive when on the sealed hierarchy.