Enhance deploy-production.sh with error handling for git pull failures. Provide user guidance for SSH key setup and switching to HTTPS if necessary. Update code-analysis.yml to include Node.js setup with caching for improved workflow efficiency.

deploy-production.sh

@@ -137,7 +137,18 @@ git clean -fd \
 
 # Pull latest changes
 echo "   Pulling latest changes..."
-git pull
+if ! git pull --ff-only; then
+  echo "ERROR: git pull fehlgeschlagen."
+  echo ""
+  echo "Häufige Ursache: SSH-Key für den aktuellen User fehlt."
+  echo "Prüfen:"
+  echo "  ssh -T git@tsschulz.de"
+  echo ""
+  echo "Optional auf HTTPS wechseln:"
+  echo "  git remote set-url origin https://tsschulz.de/<owner>/<repo>.git"
+  echo "Oder SSH-Key für User $(id -un) hinterlegen."
+  exit 1
+fi
 
 # Reset any accidental changes from stash restore (should be none now)
 git reset --hard HEAD >/dev/null 2>&1