Apply suggested fix to start from Copilot Autofix

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>

Author: nijel

start

@@ -248,7 +248,7 @@ esac
 
 if [ $VERSION_CHECK -eq 1 ]; then
     # Fetch server version
-    PGVERSION=$(psql -h "$POSTGRES_HOST" -p "$POSTGRES_PORT" -d "${POSTGRES_DB:-$POSTGRES_DATABASE}" -U "$POSTGRES_USER" -t -A -c 'SHOW server_version_num;')
+    PGVERSION=$(psql -h "$POSTGRES_HOST" -p "$POSTGRES_PORT" -d "${POSTGRES_DB:-$POSTGRES_DATABASE}" -U "$POSTGRES_USER" -t -A -c 'SHOW server_version_num;') || { >&2 echo "Failed to connect to PostgreSQL to determine server version"; exit 1; }
 
     unset PGPASSWORD