Fix BDD test failure masking by adding pipefail to staging workflow

Co-authored-by: dannystaple <426859+dannystaple@users.noreply.github.com>

Author: Copilot

.github/workflows/on_call_staging_test.yaml

@@ -46,6 +46,7 @@ jobs:
           
           # Perform the tests
           set +e  # Don't exit on error so we can clean up
+          set -o pipefail  # Ensure pipeline returns exit code of first failing command
           exit_code=0
           
           curl -I -f http://localhost:8080/ || exit_code=1