Initialize clean CSR inventory repository

Dockerfile

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+FROM python:3.13-slim AS runtime
+
+ENV PYTHONDONTWRITEBYTECODE=1 PYTHONUNBUFFERED=1 PIP_NO_CACHE_DIR=1
+WORKDIR /app
+
+RUN addgroup --system app && adduser --system --ingroup app app \
+    && apt-get update && apt-get install -y --no-install-recommends libpq5 postgresql-client \
+    && rm -rf /var/lib/apt/lists/*
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+COPY . .
+RUN chmod +x /app/scripts/entrypoint.sh /app/scripts/backup.sh /app/scripts/restore.sh \
+    && mkdir -p /app/staticfiles /app/media \
+    && chown -R app:app /app
+USER app
+EXPOSE 8000
+ENTRYPOINT ["/app/scripts/entrypoint.sh"]
+CMD ["gunicorn", "csr_inventory.wsgi:application", "--bind", "0.0.0.0:8000", "--workers", "3", "--threads", "2", "--timeout", "60", "--access-logfile", "-", "--error-logfile", "-"]