* feat: implement automatic PR discovery and attachment for task attempts
- Add GitHub API methods to list PRs for a branch (open and all states)
- Create /pr/attach endpoint to discover and attach existing PRs
- Automatically mark tasks as done when attached PR is merged
- Update Merge model to support PR status on creation
- Handle both open and closed/merged PRs during attachment
This improves on #837 by using GitHub API to automatically discover PRs
rather than requiring manual input of PR details.
* fix: address PR review feedback
- Fix compilation issue by using find_latest_by_task_attempt_id
- Properly handle Merge enum (Direct vs Pr variants)
- Remove redundant list_prs_for_branch method
- Simplify PR discovery to use only list_all_prs_for_branch
- Only check for existing PR merges, not direct merges
* fix: resolve compilation issues
- Fix SQLx cache issue by restoring exact original create_pr method
- Fix API response type for GitHub token error
- Fix ProjectError variant name to ProjectNotFound
- Add update_status call after PR creation for non-open PRs
* fix: address PR review feedback
- Fix compilation issue by using find_latest_by_task_attempt_id
- Properly handle Merge enum (Direct vs Pr variants)
- Remove redundant list_prs_for_branch method
- Simplify PR discovery to use only list_all_prs_for_branch
- Only check for existing PR merges, not direct merges
- Update code to match current TaskAttempt struct (branch: String, target_branch: String)
* Clippy, fmt, cleanup
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Co-authored-by: Alex Netsch <alex@bloop.ai>
2b277d3ddf