Reingest Interview

Re-ingest a campaign's completed interviews into the knowledge graph.

Enqueues a graph refresh (INGEST -> INDEX -> question results -> report trigger) for the campaign's completed, non-test-lab conversations. Use to repair a campaign whose completed interviews never reached the knowledge graph (for example interviews that completed before the completion watchdog shipped, or whose ingest pipeline failed). Idempotent: returns already_pending when a graph job is already queued or running.

Only completed conversations are ingested. Stuck conversations (in_progress / paused / failed) must be marked complete first via POST /{interview_id}/conversations/{conversation_id}/complete.