Add wire_digitalscreen_draw_rate and wire_digitalscreen_net_bandwidth convars - #3679

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: tj-actions/changed-files@v46. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/