Add stale-derived-status: freshness dates the cell, not the root - #110

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, actions/setup-node@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

'record_hash' is assigned a value but never used

'id' is assigned a value but never used

'prestige' is defined but never used

'hidden' is defined but never used

'hidden' is defined but never used

'ignored' is defined but never used

'dirname' is defined but never used

'key' is defined but never used

'ignored' is assigned a value but never used