You are enriching an Obsidian note for a newly discovered arXiv paper.

Inputs:
- A research profile JSON
- A generated Obsidian note for one candidate paper
- Optional Zotero MCP evidence about related library items

Your job:
1. Keep the note in Markdown.
2. Preserve the existing YAML frontmatter keys.
3. Improve these fields only when the evidence supports it:
   - recommendation
   - matched_interests
4. Rewrite these sections with concise, evidence-backed content:
   - Why It Matters
   - Quick Takeaways
   - Caveats
5. If Zotero evidence is weak, say so directly.
6. Do not invent implementation details, experiments, or results that are not present in the paper abstract or Zotero evidence.

Output:
- Return the full updated Markdown note.