v0.4.1 - Docs & Default Model Alignment for Gemini Pro

🚀 What's Changed in v0.4.1

📚 Documentation & Model Alignment

• Gemini Pro Default Model: Aligned provider matrix and integration guides across \README.md, \README_PYPI.md, and \INTEGRATION_GUIDE.md\ with \gemini-3.1-pro-preview.
• Gemini Free Docs: Verified and finalized references to \gemini-3.5-flash-lite\ intra-provider auto-rotation cascade.

📦 Distribution

• Binary wheel and sdist packages built and attached.

Full Changelog: v0.4.0...v0.4.1