Add Copilot code review merge metrics to usage metrics reference (#61155)

Co-authored-by: mc <42146119+mchammer01@users.noreply.github.com>

Author: sophietheking

content/copilot/reference/copilot-usage-metrics/copilot-usage-metrics.md

@@ -137,6 +137,9 @@ These fields capture daily pull request creation, review, merge, and suggestion
 | `pull_requests.total_created_by_copilot` | Number of pull requests created by {% data variables.product.prodname_copilot_short %} on this specific day. |
 | `pull_requests.total_reviewed_by_copilot` | Number of pull requests reviewed by {% data variables.product.prodname_copilot_short %} on this specific day. <br/><br/>A pull request may be counted on multiple days if {% data variables.product.prodname_copilot_short %} reviews it on multiple days. |
 | `pull_requests.total_merged_created_by_copilot` | Number of pull requests created by {% data variables.product.prodname_copilot_short %} that were merged on this specific day. Each pull request is counted only on the day it is merged. |
+| `pull_requests.total_merged_reviewed_by_copilot` | Number of pull requests that were both merged and reviewed by {% data variables.copilot.copilot_code-review_short %} during the reporting period. |
 | `pull_requests.median_minutes_to_merge_copilot_authored` | Median time, in minutes, between pull request creation and merge for pull requests created by {% data variables.product.prodname_copilot_short %} and merged on this specific day. |
+| `pull_requests.median_minutes_to_merge_copilot_reviewed` | Median time, in minutes, between pull request creation and merge, calculated only for pull requests reviewed by {% data variables.copilot.copilot_code-review_short %}. |
 | `pull_requests.total_copilot_suggestions` | Number of pull request review suggestions generated by {% data variables.product.prodname_copilot_short %} on this specific day. |
 | `pull_requests.total_copilot_applied_suggestions` | Number of pull request review suggestions generated by {% data variables.product.prodname_copilot_short %} that were applied on this specific day. |
+| `pull_requests.copilot_suggestions_by_comment_type` | Aggregated counts of {% data variables.product.prodname_copilot_short %} code review suggestions, broken down by the comment type {% data variables.product.prodname_copilot_short %} assigned (for example, `security` or `bug_risk`). Each entry includes `comment_type`, `total_copilot_suggestions`, and `total_copilot_applied_suggestions`. Not available at the repository level. |