Usage metrics API adds pull request review stages

Automated excerpt

The enterprise and organization repository-level Copilot usage metrics reports now break down how long pull requests spend in each stage of review. A new pull_request_review_times array on each repos-1-day row reports a median and a 90th percentile for the time from ready for review to first review, first review to final review, and final review to merge. authored_by and reviewed_by: Who opened and who reviewed the pull requests in this entry. The first-to-final review stage is 0 when pull requests receive a single review.

Selected automatically from source text; not independently written or fact-checked. Read the original for full context.