* fix: return actionable error when git push fails due to workflows scope
- Root cause: push failure with "workflows scope" error returned a generic
"Git push failed: ..." message, causing the agent to retry 10+ times
- Change: detect "workflows" + "scope" in push output and return a clear
message instructing the agent to remove .github/workflows/ file changes
- Verified: unit tests cover both the workflow-scope path and the
non-workflow path to prevent regressions
* fix: detect github workflow permission push failures
* style: ruff-format checkout line in commit_and_open_pr
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Co-authored-by: LangSmith Forge <forge-agent@langsmith.ai>
Co-authored-by: Johannes du Plessis <johannes@langchain.dev>
