import
suspend fun importSignedOutboxBatch(commandId: CommandId, eventBatchJson: String): AccountOperationResult
Recover one old outbox batch idempotently.
commandId must remain stable across retries. eventBatchJson is a non-empty JSON array no larger than 512 KiB and containing at most 512 complete signed events. Rust selects the account's active relay. A malformed, duplicate, oversized, forged, or command-conflicting batch commits nothing.