Phase 2: Test agents on real development tasks

[sergi039]

Test installed agents on actual projects:

1. code-reviewer - test on Polymarket Arbitrage PR
2. security-auditor - audit trading bot credentials handling
3. python-pro - refactor Funding Screener code
4. nextjs-pro - add feature to Inbox Zero
5. database-optimizer - optimize VSDB queries

Document results and iterate.