Currently, notification policies evaluate per-run event, so each policy execution can only see a single run. This means:
Multiple PR comments (one per run) clutter the PR timeline
Reviewers must click into each run individually to see what changed
Teams resort to building external aggregators (webhooks → custom service → GitHub API) to work around this
Add the ability for native support for aggregating all proposed runs triggered by the same commit/PR into a single GitHub PR comment