OperationStatus

Where an Operation is. Open: new values may be added. succeeded, succeeded_with_failures, failed and cancelled are final.

A string. The SDKs keep a value they do not know yet as the string itself (Python: an unknown member carrying it), so a newer server never breaks an older SDK.

Value	Description
queued	Waiting to start.
running	Running.
succeeded	Finished with no failures. Final.
succeeded_with_failures	Finished, but some enrichments did not complete; see partialFailures. Final.
failed	The core work failed; see error. Final.
cancelled	Cancelled before it finished. Final.

Used by CreateDocument.