ci-speedup

From the author

Speeds up CI and the merge path: finds where changes wait between push and deploy, then fixes the critical path, check placement, merge queue or post-merge checks with auto-revert, flaky tests, and deploy rate. Use when "CI is slow", "speed up CI", "do we need a merge queue", "main keeps going red", "flaky tests block merges", agents open PRs faster than they merge, or building a self-healing merge loop.