chore: preserve private asset structure and ignore bytecode

.gitignore

@@ -1 +1,6 @@
 /build/
+__pycache__/
+*.py[cod]
+/private-assets/**
+!/private-assets/**/
+!/private-assets/**/.gitkeep

run-open-question-tests.sh

@@ -66,7 +66,7 @@ python3 open_questions/tools/decision_probe.py all \
   --fixture-manifest "$FIXTURE_MANIFEST" \
   "${INCLUDE_FALLBACK[@]}" \
   --out "$OUT"
-python3 -m unittest discover -s open_questions/tests -v
+env PYTHONDONTWRITEBYTECODE=1 python3 -m unittest discover -s open_questions/tests -v
 
 python3 - "$OUT" "$ROOT/reports/open-questions" <<'PY'
 import json,sys

test-harness.sh

@@ -3,4 +3,4 @@
 set -euo pipefail
 ROOT="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
 cd "$ROOT"
-exec python3 -m unittest discover -s tests -v
+exec env PYTHONDONTWRITEBYTECODE=1 python3 -m unittest discover -s tests -v