fix: add PostgreSQL and Stellar RPC health checks to config - #1239

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

1 issue was detected with this workflow: CodeQL language 'javascript' is referenced by more than one entry in the 'language' matrix parameter for job 'analyze'. This may result in duplicate alerts. Please edit the 'language' matrix parameter to keep only one of the following: 'javascript', 'typescript'.