sync: bug fixes + eval system from private repo

- Fix chunk_status: pass chunk_status/chunk/metadata to context builder
- Fix vector search: scope by node_id BEFORE similarity search
- Add eval logging system (RAH_EVALS_LOG=1)
- Add eval dashboard at /evals
- Add vitest for testing

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/evals/scenarios/index.ts

@@ -0,0 +1,33 @@
+import { scenario as simpleQuery } from './simple-query';
+import { scenario as searchEmbeddings } from './search-embeddings';
+import { scenario as createNode } from './create-node';
+import { scenario as hardModeQuery } from './hard-mode-query';
+import { scenario as workflowIntegrate } from './workflow-integrate';
+import { scenario as updateNode } from './update-node';
+import { scenario as createEdge } from './create-edge';
+import { scenario as queryDimensions } from './query-dimensions';
+import { scenario as getDimension } from './get-dimension';
+import { scenario as dimensionLifecycle } from './dimension-lifecycle';
+import { scenario as delegateMini } from './delegate-mini';
+import { scenario as delegateWise } from './delegate-wise';
+import { scenario as youtubeExtract } from './youtube-extract';
+import { scenario as websiteExtract } from './website-extract';
+import { scenario as paperExtract } from './paper-extract';
+
+export const scenarios = [
+  simpleQuery,
+  searchEmbeddings,
+  createNode,
+  updateNode,
+  createEdge,
+  queryDimensions,
+  getDimension,
+  dimensionLifecycle,
+  hardModeQuery,
+  workflowIntegrate,
+  delegateMini,
+  delegateWise,
+  youtubeExtract,
+  websiteExtract,
+  paperExtract,
+];