[REDACTED] authoritative fast-path disables PII/NER scrubbing — unsafe for repo-mined text

Scoping a new cloud producer (PJ-ingest: an ephemeral-clone → derivations → v2-ingest-door pipeline) that would write through V2IngestService.ingest() the same way the existing warming importers (Stream B/C) do. Copying Stream B/C's payload convention verbatim — source:'spine-importer' + extractionSource:'cold-start-seed' — looked like the obvious reuse move since every existing background producer uses exactly that pair.