feat(release): publish minimal self-contained Magent source

scripts/ci_backend_quality_gate.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+cd "$repo_root"
+
+python_bin="${PYTHON_BIN:-python3}"
+
+echo "Installing backend Python requirements and quality tools"
+"$python_bin" -m pip install -r backend/requirements-dev.txt
+
+echo "Running Python dependency integrity check"
+"$python_bin" -m pip check
+
+echo "Auditing Python production dependencies"
+"$python_bin" -m pip_audit -r backend/requirements.txt --progress-spinner off
+"$python_bin" -m pip_audit -r docker/requirements-runtime.txt --progress-spinner off
+
+echo "Linting backend application code"
+"$python_bin" -m ruff check backend/app scripts/container_smoke.py scripts/check_environment_docs.py backend/tests/test_container_packaging.py backend/tests/test_container_bootstrap.py backend/tests/test_managed_setup_origin.py backend/tests/test_environment_docs.py
+
+echo "Running backend unit tests with coverage"
+"$python_bin" -m coverage erase
+"$python_bin" -m coverage run -m unittest discover -s backend/tests -p "test_*.py" -v
+"$python_bin" -m coverage report
+
+echo "Backend quality gate passed"