Add retrieval-with-metadata-filters tutorial

[tbw-ai]

Summary

• New tutorial under the memory pillar walking through how to retrieve from a vector store with metadata filters and return the right chunk
• Built with Qdrant + Anthropic; written and verified via the Phase 11B writer + 8-check rubric (scripts/generate-tutorial.mjs + scripts/verify-tutorial.mjs)
• queue/topics.json flipped queued -> published for this topic; metadata.json flipped drafted -> published so the Builder Weekly fetcher will pick it up

Verifier rubric

[PASS] scope
[PASS] intent
[PASS] promotional
[PASS] on-topic
[PASS] fact-verification
[PASS] consistency
[PASS] voice
[PASS] soul-line
Result: 8/8 checks passed

Test plan

• Run node scripts/verify-tutorial.mjs --path entries/retrieval-with-metadata-filters (or equivalent) to confirm rubric still passes after merge
• After merge, confirm Builder Weekly's /tutorials index picks up the entry on next build (status=published required by fetcher)

🤖 Generated with Claude Code