Upgrade to Node.js 24

Node.js 24 will be forced in Github Actions on June 2nd, 2026:

> Warning: Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: azure/postgresql@v1. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

I haven't tested if the `azure/postgresql@v1` action works on Node.js 24. Please update the action to v24 to ensure that deployments work after v24 is enforced.

Beginne mit der Untersuchung der GitHub-Action-Definition und der Metadaten des Repositorys, um die Action azure/postgresql@v1 zu finden und zu bestimmen, wie deren Node.js-Laufzeit konfiguriert ist. Prüfe die verfügbare Action-Version und das Verhalten des Deployment-Workflows, aktualisiere dann die referenzierte Action entsprechend und verifiziere, dass PostgreSQL-Deployments weiterhin mit Node.js 24 funktionieren.

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