Analyze GitHub Actions failures and propose fixes. Use when a user shares a failing GitHub Actions run URL/id, says 'CI is failing', asks 'why did this workflow fail', wants logs summarized, wants the minimal fix, or wants an automated PR to address the failure. Uses the GitHub CLI (`gh`) and GitHub API to fetch run metadata/logs safely and produce a concise root-cause + next steps report.

分析 GitHub Actions 失败原因并提出修复方案。当用户提供失败的 GitHub Actions 运行链接或 ID、提到“CI 失败”、询问“此工作流为何失败”、希望汇总日志、寻求最小修复方案或需要自动生成修复 PR 时使用。通过 GitHub CLI（gh）和 GitHub API 安全获取运行元数据与日志，并生成简明的根因分析及后续步骤报告。