github_feedback.py posts pipeline status to GitHub PRs at three touchpoints:
discovery ack, eval review result, and merge/close outcome. Only fires for
PRs with a github_pr link (set by sync-mirror.sh). All calls non-fatal.
contributor.py: expanded git author fallback to scan all non-merge commits
(was only checking last commit), added teleo-bot and github-actions[bot]
to bot filter list.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
