Automated PR & Release Notes Assistant

Automates PR description generation, change summaries, suggested test cases, and release notes using Copilot SDK in the PR flow or as a part of CI/CD. Posts drafts as PR comments for review.

- Place in: GitHub Actions, possible admin/internal UI
- KPIs: Average PR review time, merged-on-first-review rate
- Notes: Internal tool or packaged as a premium agency feature.

Effort: Medium.