Module config 

StateBackendConfig: tagged enum selecting storage for checkpointed vnode artifacts. Three shapes: in_process, local (filesystem path), object_store (S3/GCS/Azure/file URL).

Structs

StorageOptions

Cloud credential/config overrides for the state object store. Debug redacts values — they can hold secrets (aws_secret_access_key, …).

Enums

StateBackendBuildError

Failure modes for StateBackendConfig::build.

StateBackendConfig

Tagged-union config that selects checkpoint-artifact storage.