build(deps): bump fastify from 5.12.5 to 5.12.7 - #660

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: DigiPie/mongo-action@6d27db18a4ce1bb707cd221e3408e5c7a8590c8c. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/