feat: close the audit backlog - honest update checks, resumable installs, and a trust chain that reaches the apps - #68

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: rustsec/audit-check@69366f33c96575abad1ee0dba8212993eecbe998. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/