* chore: remove claude-logs from git

* fix: remove singleton caching to resolve async event loop issues

- Removed model instance caching from AIFactory
- Each create_* call now returns a fresh instance
- Fixes "Event loop is closed" errors in pytest-asyncio
- Simplifies codebase and improves test isolation

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

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

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Co-authored-by: Claude <noreply@anthropic.com>