zsh-compatible: use find instead of glob to avoid NOMATCH error

Land and deploy workflow. Merges the PR, waits for CI and deploy, verifies production health via canary checks. Takes over after /ship creates the PR. Use when: "merge", "land", "deploy", "merge and verify", "land it", "ship it to production". (gstack)

Source: github.com/garrytan/gstack/tree/main/land-and-deploy · License: MIT