Enrich on ingest: LLM summaries at write time
New papers now get Letta API enrichment immediately when ingested,
no separate /api/enrich step needed. Falls back to heuristic summary
if Letta is unavailable.
Both poll endpoint and cron handler enriched.
👾 Generated with [Letta Code](https://letta.com)
Co-Authored-By: Letta Code <noreply@letta.com>