📝 Generate release notes for v1.9.1

[github-actions]

Release: v1.9.1
Previous Tag: v1.9.0

@coderabbitai Please generate release notes by analyzing the commits between the previous tag and this release.

Instructions:

1. Analyze each commit message and the actual code changes
2. Group changes into appropriate categories
3. Write concise, user-friendly descriptions (not developer-focused)
4. Focus on what changed from the user's perspective

For patch releases (x.x.X), use this format:

🛠️ Changelog

🐞 Bug Fixes:

• [brief user-friendly description]

⚡ Enhancements:

• [brief user-friendly description]

---

For minor releases (x.X.0) with new features, use this format:

🛠️ Changelog

🚀 New Features:

• [brief user-friendly description]

🐞 Bug Fixes:

• [brief user-friendly description]

⚡ Enhancements:

• [brief user-friendly description]

---

For major releases (X.0.0), include an introduction:

[2-3 sentence summary of what this major release brings]

🛠️ Changelog

🚀 New Features:

• [brief user-friendly description]

🐞 Bug Fixes:

• [brief user-friendly description]

⚡ Enhancements:

• [brief user-friendly description]

---

Notes:

• Omit empty sections
• Combine related commits into single entries
• Skip internal/CI changes unless they affect users
• Keep descriptions to one line each