feat(scalar-index): push scan limit into index search - #7065

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5, Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/