Core packages: config validation, network renderers, root helper, auth, SQLite store, capture engine

Capture engine streams dumpcap pcapng into verbatim, hashed segments with
per-segment tshark summaries; display filters, PDML dissection with verified
byte ranges, export and import. Tests run in a Debian trixie container.

tests/integration/Dockerfile

@@ -0,0 +1,8 @@
+# Test environment mirroring the Raspberry Pi OS (Debian trixie) userland.
+# Used only for automated tests; the appliance itself does not use Docker.
+FROM debian:trixie
+ENV DEBIAN_FRONTEND=noninteractive
+RUN echo "wireshark-common wireshark-common/install-setuid boolean false" | debconf-set-selections && \
+    apt-get update -qq && apt-get install -y -qq --no-install-recommends \
+      tshark dnsmasq-base nftables iproute2 iputils-ping curl bind9-dnsutils \
+      python3 busybox procps ca-certificates >/dev/null && rm -rf /var/lib/apt/lists/*