产物与恢复

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符号	类别	用途
ArtifactReference	interface	References locate artifacts; only the App resolver establishes access and current validity.
ArtifactResolver	interface	App-registered resolver that turns a reference into an App value.
Artifacts	constant
defineArtifactCatalog	function	Compile a catalog of artifact resolvers plus a checked resolve entry point.
defineDurableTask	function	Compile a durable task definition into a resumable runner. Each run call locks the task id in the store, loads the checkpoint and resumes at nextStepIndex. A checkpoint from another definition id or revision, or one that fails the predicates below, is rejected instead of being repaired, because silently accepting it would replay App side effects under a different contract.
Durable	constant
DurableCheckpoint	interface	Persisted task progress; the only state a resume reads back.
durableReplayPolicies	constant
durableStatuses	constant
DurableStep	interface	One step of a durable task.
DurableStepContext	interface	Execution facts handed to a durable step.
DurableStore	interface	App implements an exclusive lock across every writer and validates/serializes stored state.
DurableTask	interface	Compiled task: resumes from the store and returns the final state.
DurableTaskDefinition	interface	Task definition, including the App hooks that guard every resume.
DurableTaskOptions	interface	Runtime options for a compiled durable task.