fix: isolate environment consumers from single-manager failures - #13

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: mheap/github-action-required-labels@388fd6af37b34cdfe5a23b37060e763217e58b03. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/