Add home-security-agent with PostgreSQL persistence for dashboard.

The autonomous agent writes all observations to agent.* tables consumed by Homelab Command on port 8765.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/home-security-agent/Dockerfile

@@ -0,0 +1,14 @@
+FROM python:3.11-slim-bookworm
+
+RUN apt-get update && apt-get install -y --no-install-recommends iputils-ping docker.io \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY agent ./agent
+COPY config ./config
+
+ENV PYTHONUNBUFFERED=1
+CMD ["python", "-m", "agent.main"]