Enhances the assign_copilot_to_issue tool to automatically poll for
the PR created by the Copilot coding agent after assignment.
Changes:
- Add findLinkedCopilotPR() to query issue timeline for CrossReferencedEvent
items from PRs authored by copilot-swe-agent
- Add polling loop (9 attempts, 1s delay) matching remote server latency
- Return structured JSON with PR details when found, or helpful note otherwise
- Add PollConfig for configurable polling (used in tests to disable)
- Add GraphQLFeaturesTransport for feature flag header support
The returned response now includes:
- issue_number, issue_url, owner, repo
- pull_request object (if found during polling)
- Note with instructions to use get_copilot_job_status if PR not yet created
Sam Morrow
09adfc71ba