Storage server is not available for SFTP uploads
sftp-ingest-import-worker failed with Storage server is not available for SFTP uploads.
Why this happens
Ingest targeted a server that is offline, not SFTP-capable, or temporarily unavailable. Distinct from No SFTP-enabled storage server (none exist at all).
Diagnose and fix
1. Enable SFTP on a healthy server; bring the target online.
2. Re-run the ingest job.
3. See SFTP on storage nodes and SFTP ingestion disabled on this server.
4. See No SFTP-enabled storage server if no server has ingest enabled.