[Persistent Wiki] Obsidian-style note storage with auto-updates and query shortcuts

[jordanpartridge]

Problem

Pure RAG lacks 'compiled once' persistent notes for fast re-queries (vs Karpathy's AI-updated Obsidian wiki).

Solution

• Persistent Markdown store (Qdrant doc field or FS export)
• Auto-update logic: re-compile if source vectors change (via embed timestamps/hashes)
• Query fallback: search wiki first, then raw vectors
• CLI: wiki:query 'HRV trends' → hits compiled note or live RAG

AC

• Bidirectional links: wiki ↔ sources
• Export to Obsidian vault
• No re-derivation perf hit on repeat asks

Hybrid goal: vectors for depth, wiki for speed. Video: https://youtu.be/dxq7WtWxi44