PDF Brain Ingest v2 (ADR-0234) Staged artifact-chain pipeline with durable NAS storage, nomic embeddings, and workload queue orchestration. Pipeline v2 Architecture Key properties: - Durable : artifacts on NAS RAID5, survive reboots/crashes - Resumable : each stage checks for existing artifacts, skips if present - Recoverable : re-run any stage from existing artifacts without re-extracting - Observable : OTEL event per stage per book Artifacts dir : - — structured markdown extraction - — taxonomy, summary, metadata - — chunk records, one per line Core Workflow 1) Preflight Status now shows bo…