fix: remove lockdown from issue-monster workflow, add security screening, switch to codex engine, and merge main#17122

pelikhan with Copilot wants to merge 5 commits into

maingithub/gh-aw:mainfrom

copilot/debug-issue-monster-failure-againgithub/gh-aw:copilot/debug-issue-monster-failure-againCopy head branch name to clipboard