Graph RAG

The executable Graph RAG spec is docs/plans/graph-rag-v1.md (v0.4, mapped to core-api / core-jobs / packages/graph-rag).

Slice specs: ACT-GRAPHRAG-03 (Phase 1 docs search), ACT-GRAPHRAG-01/02 (ingest + query), UI ACT-GRAPHRAG-ADMIN-* / STAFF-* / PORTAL-01.

Do not add workers/acct-labs/graph-rag. Do not confuse Graph RAG with Graph Studio (/admin/ops/graph-studio).