ci: force GitHub Actions to use Node.js 24

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: michaelbel

.github/workflows/ci.yml

@@ -13,6 +13,9 @@ concurrency:
   group: environment-${{ github.ref }}
   cancel-in-progress: false
 
+env:
+  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
+
 jobs:
   job-common:
     runs-on: ubuntu-24.04