Keep the highest _id given out in Fbe.fb so a deleted one is never reused - #1331

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: yegor256/copyrights-action@b4c048dcea8ece09cbe021a2a26139faf1885e44. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/