Add better profanity filter, better logging, admin CLI

deployment/Dockerfile.backend

@@ -14,12 +14,15 @@ FROM python:3.12-slim AS runtime
 WORKDIR /app
 RUN useradd -u 1000 app && \
     chown -R app /app
-USER app
 
 # 2.2. Copy content and create dirs
 COPY --chown=app backend .
 COPY --from=builder --chown=app /app/.venv .venv
-RUN mkdir -p /app/data
+RUN mkdir -p /app/data && \
+    printf '#!/bin/sh\nexec /app/.venv/bin/python /app/admin_cli.py "$@"\n' > /usr/local/bin/admin-cli && \
+    chmod +x /usr/local/bin/admin-cli
+
+USER app
 
 # 3. Final command
 ENTRYPOINT exec ./.venv/bin/fastapi run --port ${PORT:-8300} main.py