fix(apex): preserve environments and restore secure standalone operations

tests/run.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
-# Run the full engine test suite (stdlib unittest — no pytest).
+# Run the core and standalone provisioning test suites (stdlib unittest — no pytest).
 set -euo pipefail
 cd "$(dirname "$0")/.."
-exec python3 -m unittest discover -s tests -p 'test_*.py' -v
+python3 -m unittest discover -s tests -p 'test_*.py' -v
+PYTHONPATH=ci/scripts/init-node${PYTHONPATH:+:$PYTHONPATH} python3 -m unittest discover -s ci/scripts/init-node/tests -p 'test_*.py' -v