generate-pr-description

Create comprehensive pull request description based on changes in this branch, formatted as proper markdown for GitHub PR.

1. Summary: Provide clear, concise summary of what PR accomplishes
2. Changes Made: List key changes (code and non-code), highlight breaking changes
3. Testing: Describe how changes were tested, include new test cases, note manual testing performed
4. Related Issues: Link to related issues/tickets, use closing keywords if PR resolves issues
5. Additional Notes: Deployment considerations, follow-up work required, notes for reviewers