magpie-issue-fix-workflow

For a single triaged <issue-tracker> issue confirmed as a bug or feature, draft a fix against <upstream> on <default-branch>. Produces the failing test, the smallest production change, the targeted+module test runs, and the commit. The PR is NOT opened on autopilot; the human committer reviews, signs, and pushes. Hand-back artefact summarises branch, commits, test results, and scope.