ci(deploy-site): copy every top-level file the build produced, not a named list - #1228

Process completed with exit code 1.

brain health was NOT MEASURED -- 'tri stress --health' emitted no 'Score:' line, so there is no number to compare against the threshold of 80. This is not a health regression. What the command actually printed:

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, mlugg/setup-zig@v2. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/